--- /dev/null
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 2017 - 2019 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// The deal.II library is free software; you can use it, redistribute
+// it, and/or modify it under the terms of the GNU Lesser General
+// Public License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// The full text of the license can be found in the file LICENSE.md at
+// the top level directory of deal.II.
+//
+// ---------------------------------------------------------------------
+
+/**
+@page changes_between_9_0_1_and_9_1_0 Changes between Version 9.0.1 and 9.1.0
+
+<p>
+This is the list of changes made between the release of deal.II version
+9.0.1 and that of 9.1.0. All entries are signed with the names of the
+author.
+</p>
+
+
+
+<!-- ----------- INCOMPATIBILITIES ----------------- -->
+
+<a name="incompatible"></a>
+<h3 style="color:red">Incompatibilities</h3>
+
+<p style="color:red">
+Following are a few modifications to the library that unfortunately
+are incompatible with previous versions of the library, but which we
+deem necessary for the future maintainability of the
+library. Unfortunately, some of these changes will require
+modifications to application programs. We apologize for the
+inconvenience this causes.
+</p>
+
+<ol>
+
+ <li>
+ Changed: Tasks of member function
+ hp::FECollection::find_face_dominating_fe_in_subset() are now divided
+ into two functions hp::FECollection::find_common_subspace()
+ and hp::FECollection::find_dominated_fe().
+ <br>
+ (Marc Fehling, 2019/04/08)
+ </li>
+
+ <li>
+ Removed: The IndexSet instantiations for FEValues::get_function_values()
+ and DataOut_DoFData::add_data_vector() have been removed.
+ <br>
+ (Daniel Arndt, 2019/03/20)
+ </li>
+
+ <li>
+ Changed: The "debug" and "release" targets that are created by the
+ DEAL_II_INVOKE_AUTOPILOT() macro no longer automatically rebuild the
+ project.
+ <br>
+ (Matthias Maier, 2019/02/05)
+ </li>
+
+ <li>
+ Changed: VectorSlice has been deprecated in favor of the more general ArrayView
+ class. All public interfaces now take ArrayView arguments instead of VectorSlice
+ arguments. Since VectorSlice now inherits from ArrayView this should be
+ compatible with the overwhelming majority of use cases.
+ <br>
+ (David Wells, 2019/01/21)
+ </li>
+
+ <li>
+ Changed: The class VectorView has been removed. The suggested replacements are
+ to either use an ArrayView, a BlockVector, or to copy the relevant subset into a
+ Vector.
+ <br>
+ (David Wells, 2019/01/11)
+ </li>
+
+ <li>
+ Changed: The particle MPI datatype macro <code>PARTICLE_INDEX_MPI_TYPE</code> is
+ now properly namespaced: its new name is
+ <code>DEAL_II_PARTICLE_INDEX_MPI_TYPE</code>.
+ <br>
+ (David Wells, 2018/11/30)
+ </li>
+
+ <li>
+ Changed: Subscriptor::subscribe cannot be called with rvalue references anymore.
+ In particular, temporary string literals cannot be used as argument. Storing
+ string literals with the same content at the same memory location is
+ implementation defined and cannot be relied upon. On the other hand, the
+ subscriber strings are not compared by their memory address anymore but by their
+ actual content.
+ <br>
+ (Daniel Arndt, 2018/11/12)
+ </li>
+
+ <li>
+ Changed: The constructor for Subscriptor requires providing a pointer to a boolean
+ that can be used to signal validity of the object pointed to by the subscribing
+ object.
+ <br>
+ (Daniel Arndt, 2018/11/02)
+ </li>
+
+ <li>
+ Deprecated: deal.II's NetCDF bindings have been deprecated. The present set of
+ bindings are incompatible with recent releases of NetCDF and, at the present
+ time, no one has volunteered to either maintain or upgrade our interface. The
+ bindings will be removed in a future version if no one steps forward to update
+ the bindings.
+ <br>
+ (David Wells, 2018/10/27)
+ </li>
+
+ <li>
+ Changed: Time is described by a real-valued scalar in Function, TensorFunction,
+ ConstantTensorFunction and ZeroTensorFunction, i.e. all of them derive from
+ FunctionTime with a real-valued scalar template parameter.
+ <br>
+ (Daniel Arndt, 2018/10/26)
+ </li>
+
+ <li>
+ Deprecated: FiniteElement::compare_for_face_domination() has been
+ deprecated and will be replaced by the more versatile function
+ FiniteElement::compare_for_domination().
+ <br>
+ (Marc Fehling, 2018/10/11)
+ </li>
+
+ <li>
+ Changed: Triangulation::create_triangulation() doesn't allow to set a boundary
+ id different from numbers::internal_face_boundary_id for internal faces anymore.
+ <br>
+ (Daniel Arndt, 2018/08/07)
+ </li>
+
+ <li>
+ Changes: The data transfer interface of the class
+ `parallel::distributed::Triangulation` now requires different kinds of
+ callback functions. `register_data_attach()` now takes
+ `std::function<std::vector<char>(cell_iterator &, CellStatus)>`,
+ which returns the buffer of the packed data. `notify_ready_to_unpack()`
+ requires `std::function<void(const cell_iterator &, const CellStatus,
+ const boost::iterator_range<std::vector<char>::const_iterator &>`, where
+ the last argument describes an iterator range, from which the callback
+ function is allowed to read.
+ <br>
+ Further, the `register_data_attach()` function now requires a boolean
+ argument `returns_variable_size_data`, which denotes if the registered
+ pack_callback function interacts with the fixed size (`=false`) or
+ variable size (`=true`) buffer for data transfer.
+ <br>
+ (Marc Fehling, 2018/07/20)
+ </li>
+
+ <li>
+ Changed: MatrixCreator::create_mass_matrix and
+ MatrixCreator::create_boundary_mass_matrix that had mixed number type (real
+ valued for the matrix and complex valued for vectors) have been changed to
+ support complex number types uniformly. This implies that now all
+ underlying number types of matrix, vectors and AffineConstraint objects
+ have to match; mixed variants are no longer supported.
+ <br>
+ (Matthias Maier, 2018/05/25)
+ </li>
+
+ <li>
+ Changed: The AffineConstraints object (formerly ConstraintMatrix) gained a
+ template parameter for the underlying storage type. In order to facilitate
+ this change, the interface for AffineConstraints has become more strict: In
+ particular, the AffineConstraints::distribute_local_to_global(),
+ AffineConstraints::add_entries_local_to_global(), and other functions now
+ require that all matrix and vector arguments have the same matching number
+ type as the AffineConstraints object.
+ <br>
+ (Matthias Maier, 2018/05/25)
+ </li>
+
+ <li>
+ Changed: The OpenCASCADE Manifold classes with names ending in Boundary (i.e.,
+ NormalProjectionBoundary, DirectionalProjectionBoundary, and
+ NormalToMeshProjectionBoundary) have been deprecated in favor of renamed classes
+ ending in Manifold (i.e., NormalProjectionManifold,
+ DirectionalProjectionManifold, and NormalToMeshProjectionManifold).
+ <br>
+ (David Wells, 2018/05/16)
+ </li>
+
+ <li>
+ Changed: The PolynomialSpace::compute_index() and
+ PolynomialsP::directional_degree() functions used to return their
+ information through an array that they received as a reference
+ argument. Instead, they now return a `std::array<unsigned int,dim>`
+ by value.
+ <br>
+ (Wolfgang Bangerth, 2018/05/09)
+ </li>
+
+</ol>
+
+
+<!-- ----------- GENERAL IMPROVEMENTS ----------------- -->
+
+<a name="general"></a>
+<h3>General</h3>
+
+<ol>
+
+ <li>
+ Improved: All tutorial programs have been reviewed and updated with new features
+ in the library and C++11.
+ <br>
+ (Daniel Arndt, David Wells, Matthias Maier, Denis Davydov, Wolfgang Bangerth, Jean-Paul Pelteret, 2019/05/13)
+ </li>
+
+ <li>
+ Deprecated: deal.II's nanoflann bindings (i.e., the KDTree class) have been
+ deprecated in favor of using <code>boost::geometry::index::rtree</code>.
+ <br>
+ (David Wells, 2019/05/10)
+ </li>
+
+ <li>
+ New: Ths step-64 tutorial demonstrates how to use the CUDAWrappers::MatrixFree
+ framework (possibly with MPI) and discusses the peculiarities of using CUDA
+ inside deal.II in general.
+ <br>
+ (Daniel Arndt, Bruno Turcksin, 2019/05/10)
+ </li>
+
+ <li>
+ New: The new tutorial program step-61 shows how to use "weak Galerkin" finite element method to solve the Poisson equation.
+ <br>
+ (Zhuoran Wang, 2019/05/02)
+ </li>
+
+ <li>
+ New: The new tutorial program step-62 shows how to calculate the resonance
+ frequency and the bandgap of a phononic crystal. The program solves the elastic
+ wave equation with Perfectly Matches Layers in the frequency domain using
+ complex algebra and parallelization via MUMPS and MPI.
+ <br>
+ (Daniel Garcia-Sanchez, 2019/05/01)
+ </li>
+
+ <li>
+ New: The tutorial examples now all use a quadrature formula with a degree depending on the degree of the
+ finite element, so that one changing the finite element degree does not also require changing by hand the number
+ of quadrature points.
+ <br>
+ (Roland Richter, 2019/04/25)
+ </li>
+
+ <li>
+ New: The ParsedConvergenceTable class allows convenient construction of convergence tables, exploiting
+ parameter files.
+ <br>
+ (Luca Heltai, 2019/04/10)
+ </li>
+
+ <li>
+ New: A new class Differentiation::SD::Expression has been added which allows
+ the creation and manipulation of scalar symbolic functions using the SymEngine
+ library. It will later be used as the basis of symbolic tensor calculus, amongst
+ other things. It incorporates numerous features, which currently include:
+ <ul>
+ <li>expression parsing,</li>
+ <li>comparison operations,</li>
+ <li>logical operations,</li>
+ <li>basic math operations,</li>
+ <li>conditional expression construction,</li>
+ <li>differentiation,</li>
+ <li>substitution (partial and complete), and</li>
+ <li>serialization.</li>
+ </ul>
+ <br>
+ (Jean-Paul Pelteret, 2019/03/29)
+ </li>
+
+ <li>
+ New: A new class Differentiation::AD::VectorFunction has been
+ added to help implement point-wise vector functions using automatic
+ differentiation. In particular, this class is designed to compute the
+ Jacobian of a vector function that is parameterized in
+ terms of scalar, vector, and tensor arguments. One example of its use
+ would be to compute the linearization of a multi-field constitutive
+ law that is expressed in terms of some kinetic variables.
+ <br>
+ (Jean-Paul Pelteret, 2019/03/21)
+ </li>
+
+ <li>
+ New: Triangulation::execute_coarsening_and_refinement() now also performs
+ p-coarsening and p-refinement on all attached hp::DoFHandler objects.
+ <br>
+ (Marc Fehling, 2019/03/18)
+ </li>
+
+ <li>
+ New: A new class Differentiation::AD::ScalarFunction has been
+ added to help implement point-wise scalar functions using automatic
+ differentiation. In particular, this class is designed to compute the
+ gradient and Hessian of a scalar function that is parameterized in
+ terms of scalar, vector, and tensor arguments. One example of its use
+ would be to compute the derivatives of a multi-field constitutive law
+ that is expressed in terms of an energy function.
+ <br>
+ (Jean-Paul Pelteret, 2019/02/20)
+ </li>
+
+ <li>
+ Improved: The preconditioner and solver setup in step-20 has been rewritten
+ to highlight the new LinearOperator and PackagedOperation classes.
+ <br>
+ (Matthias Maier, 2019/02/08)
+ </li>
+
+ <li>
+ New: Support for Ginkgo, a high-performance numerical linear algebra library
+ has been added. Ginkgo provides advanced highly optimized linear solvers,
+ matrix formats and an abstraction to easily create linear operators on both
+ the cpu and the gpu. The deal.II's Ginkgo interface can currently be used to
+ solve linear systems using Krylov solvers with the cuda and OpenMP paradigms.
+ <br>
+ (Ginkgo developers, 2019/01/30)
+ </li>
+
+ <li>
+ Changed: Class hp::DoFHandler now transfers the active_fe_index of each
+ cell automatically when refining/coarsening a Triangulation,
+ parallel::shared::Triangulation, or
+ parallel::distributed::Triangulation. However, serialization of a
+ parallel::distributed::Triangulation still requires a user to
+ explicitly call the functions
+ hp::DoFHandler::prepare_for_serialization_of_active_fe_indices() and
+ hp::DoFHandler::deserialize_active_fe_indices().
+ <br>
+ (Marc Fehling, 2019/01/27)
+ </li>
+
+ <li>
+ New: A new HDF5 interface has been added. The Hierarchical Data Format (HDF) is
+ a cross platform and a high I/O performance format designed to store large
+ amounts of data. It supports serial and MPI I/O access. The deal.II's HDF5
+ interface can be used to write and read data, such the results of a simulation,
+ in a HDF5 file.
+ <br>
+ (Daniel Garcia-Sanchez, 2019/01/09)
+ </li>
+
+ <li>
+ Changed: hp::DoFHandler now automatically sets active_fe_indices
+ on cells that will be refined and coarsened whenever a Triangulation or
+ parallel::shared::Triangulation is used. Upon refinement, the
+ active_fe_index will be passed on to the children. For coarsening, the
+ parent's active_fe_index will be determined from its former children
+ using the FiniteElementDomination logic.
+ <br>
+ (Marc Fehling, 2018/10/15)
+ </li>
+
+ <li>
+ New: Function FiniteElement::compare_for_domination() inspects two
+ FiniteElement objects upon FiniteElementDomination, and uses a codim
+ parameter that determines in which subspace we actually compare them.
+ <br>
+ (Marc Fehling, 2018/10/11)
+ </li>
+
+ <li>
+ New: A new class Differentiation::AD::ResidualLinearization has been
+ added to help compute the linearization of a residual vector defined on the
+ level of a cell (a finite element residual), or for local nonlinear equations.
+ <br>
+ (Jean-Paul Pelteret, 2018/09/30)
+ </li>
+
+ <li>
+ Changed: hp::DoFHandler::distribute_dofs() called on
+ parallel::distributed::Triangulation objects now assigns exactly
+ one index for each degree of freedom located on interfaces with
+ ghost cells. Previously, those degrees of freedom were assigned
+ indices by each adjacent subdomain.
+ <br>
+ (Marc Fehling, 2018/08/31)
+ </li>
+
+ <li>
+ New: A new class Differentiation::AD::EnergyFunctional has been
+ added to help implement (incremental) variational formulations using automatic
+ differentiation. In particular, this class is designed to compute the finite
+ element residuals and their linearizations.
+ <br>
+ (Jean-Paul Pelteret, 2018/08/27)
+ </li>
+
+ <li>
+ New: The parallel::distributed::SolutionTransfer class is now capable
+ of transferring data that has been associated with a hp::DoFHandler
+ object. See the class documentation of the former on how to use this
+ new functionality.
+ <br>
+ (Marc Fehling, 2018/08/15)
+ </li>
+
+ <li>
+ Improved: GridGenerator::extrude_triangulation can now optionally extrude manifold
+ ids.
+ <br>
+ (David Wells, 2018/08/11)
+ </li>
+
+ <li>
+ New: FE_BernardiRaugel is the implementation of an element developed by Christine Bernardi and
+ Genevieve Raugel in the 1985 Mathematics of Computation paper. The Bernardi-Raugel element is an
+ enrichment of the P1-P0 element for Stokes problems by the addition of edge-based quadratic
+ bubble functions. The original description is for simplicial meshes, but this implementation is
+ for quadrilateral and hexahedral meshes. The BR1-P0 pair is LBB stable for Stokes problems. Due
+ to the edge-based bubble functions, features such as hanging nodes are not supported.
+ <br>
+ (Graham Harper, 07/09/2018)
+ </li>
+
+ <li>
+ New: A new function GridGenerator::channel_with_cylinder has been added. This
+ function generates a grid corresponding to the classic flow past a cylinder test
+ problem, and uses manifolds to blend between the description of the cylinder and
+ the Cartesian bulk geometry.
+ <br>
+ (David Wells, 2018/07/04)
+ </li>
+
+ <li>
+ Changed: The ConstraintMatrix class has been renamed to AffineConstraints.
+ Further, AffineConstraints gained a template parameter for the underlying
+ storage type. This in particular enables the definition of complex-valued
+ constraints (for example, complex-valued Dirichlet boundary conditions, or
+ periodic boundary conditions with an additional phase shift).
+ <br>
+ (Matthias Maier, Daniel Arndt, David Wells, 2018/05/31)
+ </li>
+
+ <li>
+ New: The introduction to step-6 has been completely rewritten. It
+ previously mentioned only the bare minimum about what this important
+ tutorial program actually does. It now gives a much broader overview
+ of why we use adaptive meshes and how this is achieved in practice.
+ <br>
+ (Wolfgang Bangerth, 2018/05/25)
+ </li>
+
+ <li>
+ Changed: clang-format replaces astyle as source code formatting tool.
+ <br>
+ (Matthias Maier, Daniel Arndt, 2018/05/24)
+ </li>
+
+ <li>
+ New: FE_NedelecSZ is a new H(curl)-conforming element which overcomes the sign conflict problem
+ which can be encountered for Nedelec elements on hexahedral meshes. This is an implementation of
+ the method described in the PhD thesis of Sabine Zaglmayr and should be considered over the
+ FE_Nedelec element where meshes with non-standard orientation are used. Note that not all
+ functionality (e.g. Hessians), has been implemented for this element.
+ <br>
+ (Ross Kynch, 2018/04/28)
+ </li>
+
+ <li>
+ New: The new class ColorEnriched::Helper constructs an hp::FECollection, a
+ collection of finite element objects used by hp::DoFHandler, in a domain
+ with multiple, possibly overlapping, sub-domains with individual
+ enrichment functions. Note that the overlapping regions may have
+ multiple enrichment functions associated with them. This is implemented
+ using a general constructor of FE_Enriched which allows different
+ enrichment functions.
+ <br>
+ (Nivesh Dommaraju, Denis Davydov, 2018/04/20)
+ </li>
+
+</ol>
+
+
+<!-- ----------- SPECIFIC IMPROVEMENTS ----------------- -->
+
+<a name="specific"></a>
+<h3>Specific improvements</h3>
+
+<ol>
+
+ <li>
+ Improved: DoFHandler::renumber_dofs() on parallel::distributed::Triangulation
+ would scale linearly with the number of MPI ranks on more than 50k ranks,
+ reaching times of more than 10 seconds on 150k ranks. This is now fixed for
+ the case the renumbering does not lead to a change in the underlying IndexSet
+ field of locally owned unknowns, i.e., in case the numbers merely change
+ within each MPI rank but not across them.
+ <br>
+ (Martin Kronbichler, 2019/05/10)
+ </li>
+
+ <li>
+ New: Introduced indices for future finite elements that cells will be assigned
+ to after the triangulation changes. The future_fe_index of each cell can be
+ accessed and changed via member functions of the DoFCellAccessor class,
+ namely DoFCellAccessor::future_fe_index(), DoFCellAccessor::set_future_fe_index(),
+ DoFCellAccessor::future_fe_index_set(), and DoFCellAccessor::clear_future_fe_index().
+ <br>
+ (Marc Fehling, 2019/05/10)
+ </li>
+
+ <li>
+ New: Add Utilities::MPI::mean_and_standard_deviation() to calculate mean and standard deviation.
+ <br>
+ (Denis Davydov, 2019/05/09)
+ </li>
+
+ <li>
+ New: Add DynamicSparsityPattern::get_view() to create a subset of a sparsity pattern based on a selection of some rows.
+ <br>
+ (Denis Davydov, 2019/05/08)
+ </li>
+
+ <li>
+ New: Some utility functions that perform symbolic substitution on, and
+ evaluation of, symbolic scalar and tensor expressions have been added to the
+ Differentiation::SD namespace.
+ <br>
+ (Jean-Paul Pelteret, 2019/05/07)
+ </li>
+
+ <li>
+ Improved: Extend Utilities::inverse_Hilbert_space_filling_curve to handle degenerate cases.
+ <br>
+ (Denis Davydov, 2019/05/07)
+ </li>
+
+ <li>
+ New: Some utility functions that resolve explicit (and cyclic) dependencies
+ between entries in symbolic substitution maps.
+ <br>
+ (Jean-Paul Pelteret, 2019/05/05)
+ </li>
+
+ <li>
+ New: Some utility functions that facilitate the creation of symbolic maps and
+ symbolic substitution maps have been added to the Differentiation::SD namespace.
+ <br>
+ (Jean-Paul Pelteret, 2019/05/05)
+ </li>
+
+ <li>
+ New: Mapping::get_bounding_box() returns the correct bounding box for mappings that do not preserve vertex
+ locations.
+ <br>
+ (Luca Heltai, 2019/05/03)
+ </li>
+
+ <li>
+ Improved: The `Meshworker::mesh_loop()` function is now capable of working with an
+ IteratorRange, and also supports iterator ranges constructed from
+ FilteredIterators.
+ <br>
+ (Jean-Paul Pelteret, 2019/05/02)
+ </li>
+
+ <li>
+ Improved: The Workstream::run() function is now capable of working with iterator
+ ranges, or any general iterable object that defines the `begin()` and `end()`
+ of a range of elements to iterate over.
+ <br>
+ (Jean-Paul Pelteret, 2019/05/02)
+ </li>
+
+ <li>
+ New: Some utility functions that perform symbolic differentiation of scalar
+ symbolic expressions, as well as tensorial expressions, have been added to the
+ Differentiation::SD namespace.
+ <br>
+ (Jean-Paul Pelteret, 2019/04/23)
+ </li>
+
+ <li>
+ Changed: The chunk_size used in CUDA kernels has been reduced from 8 to 1 to
+ improve performance on newer architectures.
+ <br>
+ (Bruno Turcksin, 2019/04/23)
+ </li>
+
+ <li>
+ New: Some utility functions that facilitate the creation of both scalar and
+ tensor symbolic variables and symbolic functions have been added to the
+ Differentiation::SD namespace.
+ <br>
+ (Jean-Paul Pelteret, 2019/04/22)
+ </li>
+
+ <li>
+ New: Functions::CutOffFunctionBase now supports rescaling the function to keep its integral equal to one.
+ <br>
+ (Luca Heltai, 2019/04/18)
+ </li>
+
+ <li>
+ New: The new FunctionFromFunctionObjects class allows one to wrap a vector of
+ std::function objects into a Function object, to allow fast prototyping of user codes.
+ <br>
+ (Luca Heltai, 2019/04/12)
+ </li>
+
+ <li>
+ Fixed: Make sure that GridTools::Cache::get_cell_bounding_boxes_rtree() honors mappings.
+ <br>
+ (Luca Heltai, 2019/04/11)
+ </li>
+
+ <li>
+ New: Added BoundingBox::extend() that allows extending and shrinking of BoundingBox objects.
+ <br>
+ (Luca Heltai, 2019/04/11)
+ </li>
+
+ <li>
+ New: The method Mapping::get_center() allows one to retrieve the cell center of a cell when the
+ mapping object does not preserve vertex locations.
+ <br>
+ (Luca Heltai, 2019/04/11)
+ </li>
+
+ <li>
+ New: Member function hp::FECollection::find_dominated_fe_extended()
+ returns the index of the least dominating finite element out of a given
+ set of indices. If none was found, the search will be extended on the
+ complete collection.
+ <br>
+ (Marc Fehling, 2019/04/08)
+ </li>
+
+ <li>
+ New: Member function hp::FECollection::find_dominating_fe_extended()
+ returns the index of the most dominating finite element out of a given
+ set of indices. If none was found, the search will be extended on the
+ complete collection.
+ <br>
+ (Marc Fehling, 2019/04/08)
+ </li>
+
+ <li>
+ New: Member function hp::FECollection::find_dominated_fe()
+ returns the index of the least dominating finite element out of a given
+ set of indices.
+ <br>
+ (Marc Fehling, 2019/04/08)
+ </li>
+
+ <li>
+ New: Member function hp::FECollection::find_dominating_fe()
+ returns the index of the most dominating finite element out of a given
+ set of indices.
+ <br>
+ (Marc Fehling, 2019/04/08)
+ </li>
+
+ <li>
+ New: Member function hp::FECollection::find_enclosing_fes()
+ returns a set of indices from the full FECollection whose associated
+ finite elements are dominated by all elements of a given set of indices.
+ <br>
+ (Marc Fehling, 2019/04/08)
+ </li>
+
+ <li>
+ New: Member function hp::FECollection::find_common_fes()
+ returns a set of indices from the full FECollection whose associated
+ finite elements dominate all elements of a given set of indices.
+ <br>
+ (Marc Fehling, 2019/04/08)
+ </li>
+
+ <li>
+ Changed: SmartPointer and Subscriptor use a std::string
+ instead of a const char * as identifier.
+ <br>
+ (Daniel Arndt, 2019/04/08)
+ </li>
+
+ <li>
+ New: The GeneralDataStorage class facilitates the storage of any general data.
+ It offers the ability to store any amount of data, of any type, which is then
+ made accessible by an identifier string.
+ <br>
+ (Luca Heltai, Jean-Paul Pelteret, 2019/04/02)
+ </li>
+
+ <li>
+ New: Add ArraView::ArrayView() and ArrayView::reinit(value_type *, const std::size_t).
+ <br>
+ (Denis Davydov, 2019/04/02)
+ </li>
+
+ <li>
+ New: The Differentiation::SD::Expression class can now be used to perform
+ symbolic math calculations.
+ <br>
+ (Jean-Paul Pelteret, 2019/03/30)
+ </li>
+
+ <li>
+ New: The Vector class can now be initialized using an object of type
+ std::initializer_list. Such objects are, in particular, created when
+ the compiler sees a brace-enclosed list of numbers.
+ <br>
+ (Wolfgang Bangerth, 2019/03/28)
+ </li>
+
+ <li>
+ Changed: parallel::distributed::SolutionTransfer::prepare_serialization() has
+ been deprecated in favor of
+ parallel::distributed::SolutionTransfer::prepare_for_serialization().
+ <br>
+ (Daniel Arndt, 2019/03/26)
+ </li>
+
+ <li>
+ New: Added a variant of MeshWorker::mesh_loop() that takes a class and its member functions as workers
+ and copiers.
+ <br>
+ (Luca Heltai, 2019/03/23)
+ </li>
+
+ <li>
+ New: The type alias FEValuesViews::View now allows one to infer the correct FEValuesViews type
+ that would be returned by FEValuesBase::operator[]() when called with a specified extractor type from the
+ FEValuesExtractors namespace.
+ <br>
+ (Luca Heltai, 2019/03/20)
+ </li>
+
+ <li>
+ New: Add DynamicSparsityPattern::nonempty_cols()/DynamicSparsityPattern::nonempty_rows() to return columns/rows
+ stored in the sparsity pattern.
+ <br>
+ (Denis Davydov, 2019/03/20)
+ </li>
+
+ <li>
+ New: The new method GridTools::assign_co_dimensional_manifold_indicators() propagate manifold ids from
+ cells to faces and edges, according to a disambiguation function that takes the set of manifold ids of
+ the cells that share the given face or edge.
+ <br>
+ (Luca Heltai, 2019/03/19)
+ </li>
+
+ <li>
+ New: FEValuesExtractor classes now have a new method get_name() that returns a unique string identifier
+ for each extractor.
+ <br>
+ (Luca Heltai, 2019/03/19)
+ </li>
+
+ <li>
+ New: Add SparsityTools::gather_sparsity_pattern().
+ <br>
+ (Denis Davydov, 2019/03/19)
+ </li>
+
+ <li>
+ New: Add Utilities::MPI::create_ascending_partitioning() to create a one-to-one
+ ascending partitioning from locally owned sizes.
+ <br>
+ (Denis Davydov, 2019/03/19)
+ </li>
+
+ <li>
+ New: VectorTools::interpolate_to_different_mesh() now works with
+ hp::DoFHandler objects.
+ <br>
+ (Sebastian Stark, 2019/03/16)
+ </li>
+
+ <li>
+ Improved: DoFRenumbering::cell_wise() now support parallel::Triangulation .
+ <br>
+ (Denis Davydov, 2019/03/16)
+ </li>
+
+ <li>
+ Improved: The apply_all_indicators_to_manifold flag in GridIn::read_ucd()
+ lets the indicators be used for cells as manifold id as well.
+ <br>
+ (Daniel Arndt, 2019/03/16)
+ </li>
+
+ <li>
+ New: Added two new classes to the MeshWorker namespace: MeshWorker::ScratchData and
+ MeshWorker::CopyData, that can be used as good default classes with the
+ WorkStream::run() and MeshWorker::mesh_loop() functions.
+ <br>
+ (Luca Heltai, 2019/03/13)
+ </li>
+
+ <li>
+ New: If present, we will detect the LLD linker ld.lld at configuration time.
+ <br>
+ (Timo Heister, 2019/03/11)
+ </li>
+
+ <li>
+ Changed: The TrilinosWrappers::PreconditionAMG::AdditionalData data structure
+ is now able to return a parameter list, which can be adjusted and fine-tuned by
+ the user and later used to initialize the AMG preconditioner. It can also
+ initialize the null space settings of an existing parameter list.
+ <br>
+ (Jean-Paul Pelteret, 2019/03/10)
+ </li>
+
+ <li>
+ Fixed: DoFHandler::renumber_dofs() called on levels would previously run into
+ an assertion on distributed triangulation when used with continuous
+ elements. This is now fixed.
+ <br>
+ (Martin Kronbichler, 2019/03/08)
+ </li>
+
+ <li>
+ New: Added a new function Utilities::type_to_string() to demangle type names.
+ <br>
+ (Luca Heltai, 2019/03/07)
+ </li>
+
+ <li>
+ Fixed: LinearAlgebra::CUDAWrappers::Vector::add_and_dot was giving a wrong result
+ if the size of vector was greater than 4096.
+ <br>
+ (Bruno Turcksin, 2018/03/06)
+ </li>
+
+ <li>
+ Fixed: EllipiticalManifold::push_forward_gradient did previously not take the
+ rotation into account. This is now fixed.
+ <br>
+ (Daniel Appel, Martin Kronbichler, 2019/03/05)
+ </li>
+
+ <li>
+ Fixed: CylindricalManifold::get_new_point would previously return wrong
+ results if the resulting point is on the axis, and the cylinder axis does not
+ pass through the origin.
+ <br>
+ (Daniel Appel, Martin Kronbichler, 2019/03/05)
+ </li>
+
+ <li>
+ Fixed: the DoFTools::make_sparsity_pattern variant that takes, as arguments, two
+ different DoFHandler objects now works correctly with
+ parallel::shared::Triangulation and parallel::distributed::Triangulation.
+ <br>
+ (David Wells, 2019/03/04)
+ </li>
+
+ <li>
+ New: Signals Triangulation::pre_distributed_repartition and
+ Triangulation::post_distributed_repartition which will be triggered in
+ parallel::distributed::Triangulation::repartition().
+ <br>
+ (Marc Fehling, 2019/03/03)
+ </li>
+
+ <li>
+ Fixed: CellAccessor::material_id interfered with the manifold object
+ for refining the mesh in case its dimension was less than the space dimension.
+ <br>
+ (Daniel Arndt, Sebastian Stark, 2019/03/02)
+ </li>
+
+ <li>
+ New: Hierarchy of finite elements in hp::FECollection objects. Get succeeding
+ and preceding indices via hp::FECollection::next_in_hierarchy() and
+ hp::FECollection::prev_in_hierarchy(). By default, a hierarchy corresponding
+ to indices is established. Hierarchy can be overridden via
+ hp::FECollection::set_hierarchy().
+ <br>
+ (Marc Fehling, 2019/02/28)
+ </li>
+
+ <li>
+ Fixed: Tensor-valued pvtu output.
+ <br>
+ (Daniel Jodlbauer, 2019/02/27)
+ </li>
+
+ <li>
+ New: Function GridTools::guess_point_owner(), which uses a covering rtree
+ to guess which processes own the points of the given vector of points.
+ <br>
+ (Giovanni Alzetta, 2019/02/25)
+ </li>
+
+ <li>
+ Fixed: FEFaceEvaluation::evaluate() and FEFaceEvaluation::integrate() would
+ provide wrong results for faces in non-standard orientation layout, namely
+ with `orientation=true, face_flip={false,true}, face_rotation=true`. This is
+ now fixed.
+ <br>
+ (Martin Kronbichler, 2019/02/21)
+ </li>
+
+ <li>
+ New: Function DoFRenumbering::random(dof_handler, level) which allows for a random renumbering
+ of degrees of freedom on a level in a mutilevel hierarchy.
+ <br>
+ (Conrad Clevenger, 2019/02/19)
+ </li>
+
+ <li>
+ Fixed: Handle the case properly that a local matrix with all diagonal elements equal to zero is distributed with AffineConstraints::distribute_local_to_global() to the global matrix while constraints apply.
+ <br>
+ (Sebastian Stark, 2019/02/13)
+ </li>
+
+ <li>
+ Fixed: inverse_operator() now handles a (composite) LinearOperator, the
+ temporary PreconditionIdentity(), or no argument as preconditioner argument
+ correctly.
+ <br>
+ (Matthias Maier, 2019/02/13)
+ </li>
+
+ <li>
+ New: Function MGConstrainedDoFs::make_no_normal_flux_constraints which adds
+ functionality for no normal flux constraints during geometric mutigrid computations.
+ Currently, this function is limited to meshes with no normal flux boundaries
+ normal to the x-, y-, or z-axis.
+ <br>
+ (Conrad Clevenger, 2019/02/11)
+ </li>
+
+ <li>
+ New: Member functions DoFHandler::set_fe() and hp::DoFHandler::set_fe()
+ that will register a finite element object without enumerating all
+ degrees of freedom. In the hp case, the active_fe_indices will be
+ initialized and communicated amongst all processors, additionally.
+ <br>
+ (Marc Fehling, 2019/02/10)
+ </li>
+
+ <li>
+ New: make_const_array_view() creates a constant view from a non-const object.
+ <br>
+ (Daniel Arndt, 2019/02/09)
+ </li>
+
+ <li>
+ Fixed: PreconditionChebyshev would previously run one iteration more than
+ requested, i.e., perform `degree+1` matrix-vector products rather than
+ `degree` which is the convention in literature. This is now fixed. Note that
+ the quality of PreconditionChebyshev is obviously slightly reduced by this
+ change, and some solvers might need more outer iterations due to a ligher
+ Chebyshev iteration.
+ <br>
+ (Martin Kronbichler, 2019/02/08)
+ </li>
+
+ <li>
+ New: Add default constructor to SparsityPatternIterators::Accessor().
+ <br>
+ (Denis Davydov, 2019/02/08)
+ </li>
+
+ <li>
+ Improved: The iteration of PreconditionChebyshev has been overhauled to reduce
+ the number of vectors written per iteration to one, leading to slightly faster
+ execution of the vector updates.
+ <br>
+ (Martin Kronbichler, 2019/02/07)
+ </li>
+
+ <li>
+ Improved: The FEEvaluation::evaluate() and FEEvaluation::integrate() routines
+ would previously unconditionally use an evaluation routine with a
+ transformation to a collocation basis and subsequent collocation derivative
+ for `n_q_points_1d > fe_degree` because it is faster for the usual case of
+ `n_q_points_1d` close to the polynomial degree. Now, we switch back to the
+ standard evaluation if `n_q_points_1d > 3 * (fe_degree+1) / 2` where that
+ variant is faster.
+ <br>
+ (Martin Kronbichler, 2019/02/06)
+ </li>
+
+ <li>
+ Improved: Use binary search in BlockIndices::global_to_local() to improve performance
+ for large number of blocks.
+ <br>
+ (Denis Davydov, 2019/02/06)
+ </li>
+
+ <li>
+ Fixed: MGLevelGlobalTransfer::copy_to_mg would initialize the level vectors
+ without ghosts. When combined with Chebyshev smoother and a DiagonalMatrix as
+ well as specific matrix-free loops, this could lead to ghosted vectors in
+ places where they were not supposed to be ghosted, leading to exceptions. This
+ is now fixed.
+ <br>
+ (Martin Kronbichler, 2019/02/05)
+ </li>
+
+ <li>
+ Documented: The minimal supported MPI version is MPI-2.0.
+ <br>
+ (Daniel Arndt, 2019/02/02)
+ </li>
+
+ <li>
+ New: added constructor to the class Point, which converts
+ a boost::geometry::model::point to a dealii::Point
+ <br>
+ (Giovanni Alzetta, Daniel Arndt, Wolfgang Bangerth, 2019/01/31)
+ </li>
+
+ <li>
+ Changed: Function GridGenerator::general_cell() can now generate
+ a cell of dimension `dim` inside a space of dimension `spacedim`
+ with `dim <= spacedim`
+ <br>
+ (Giovanni Alzetta, 2019/01/30)
+ </li>
+
+ <li>
+ New: Add internal::MatrixFreeFunctions::DoFInfo::get_dof_indices_on_cell_batch() to
+ return locally owned DoFs used by matrix-free framework on a given cell.
+ <br>
+ (Denis Davydov, 2019/01/30)
+ </li>
+
+ <li>
+ Improved: A new dummy enumeration AD::NumberTypes::none has been added.
+ It exists to represent number types that are scalar arithmetic types,
+ i.e those that hold no derivatives. They are implemented primarily to
+ facilitate the use of template meta-programming techniques to switch
+ between different AD types. This covers the case when the user does not
+ want an AD type at all, but rather a primitive type.
+ <br>
+ (Jean-Paul Pelteret, 2019/01/25)
+ </li>
+
+ <li>
+ New: Add default constructor to DynamicSparsityPatternIterators::Accessor() and
+ DynamicSparsityPatternIterators::Iterator() to be able to store such objects
+ in STL containers.
+ <br>
+ (Denis Davydov, 2019/01/18)
+ </li>
+
+ <li>
+ New: Indentation script <code>deal.II/contrib/utilities/indent.py</code> is added
+ to format code in external projects that use deal.II
+ <br>
+ (Vishal Boddu, 2019/01/13)
+ </li>
+
+ <li>
+ New: GridTools::Cache::get_covering_rtree() automatically stores and generates
+ a rtree of bounding boxes covering the whole triangulation. In a distributed setting
+ it can identify which processes have locally owned cells in any part of the mesh.
+ <br>
+ (Giovanni Alzetta, 2019/01/11)
+ </li>
+
+ <li>
+ Fixed: Tensor indices of set_k_vectors() in FESeries::Fourier.
+ Coefficients will now be distributed in every
+ coordinate direction correctly.
+ <br>
+ (Marc Fehling, 2019/01/08)
+ </li>
+
+ <li>
+ New: LinearAlgebra::distributed::Vector with CUDA memory space uses CUDA-aware
+ MPI in case deal.II is configured with DEAL_II_MPI_WITH_CUDA_SUPPORT=ON.
+ <br>
+ (Daniel Arndt, Bruno Turcksin, 2019/01/04)
+ </li>
+
+ <li>
+ New: Add LAPACKFullMatrix::apply_givens_rotation() and Vector::apply_givens_rotation() to
+ apply a Givens rotation matrix.
+ <br>
+ (Denis Davydov, 2018/12/30)
+ </li>
+
+ <li>
+ New: Add SolverBFGS to minimize a function using the limited memory BFGS approach.
+ <br>
+ (Denis Davydov, 2018/12/26)
+ </li>
+
+ <li>
+ Replaced: TrilinosWrappers::MPI::Vector::vector_partitioner() has been
+ deprecated in favor of TrilinosWrappers::MPI::Vector::trilinos_partitioner().
+ The latter one returns an Epetra_BlockMap instead of an Epetra_Map avoiding an
+ invalid downcast.
+ The IndexSet constructor taking an Epetra_Map object has been replaced to
+ accept a base class object of type Epetra_BlockMap instead.
+ <br>
+ (Daniel Arndt, 2018/12/22)
+ </li>
+
+ <li>
+ Fixed: Reinit blockvector only when necessary in MGTransferBlockMatrixFree::copy_to_mg.
+ <br>
+ (Daniel Jodlbauer, 2018/12/19)
+ </li>
+
+ <li>
+ New: Class parallel::distributed::CellDataTransfer has been introduced to transfer
+ cell by cell data across distributed meshes in case of refinement/serialization.
+ <br>
+ (Marc Fehling, 2018/12/18)
+ </li>
+
+ <li>
+ New: Function GridTools::build_global_description_tree which exchanges a given
+ vector of bounding boxes on all processes and uses the result to build an Rtree
+ with packing algorithm.
+ <br>
+ (Giovanni Alzetta, 2018/12/17)
+ </li>
+
+ <li>
+ New: Add helpers functions to use varying coefficients when using
+ CUDAWrappers::MatrixFree.
+ <br>
+ (Bruno Turcksin, 2018/12/10)
+ </li>
+
+ <li>
+ New: GridTools::find_active_cell_around_point now allows you to specify an (optional) rtree, constructed
+ from the used vertices of the triangulation. Once you have built a tree, querying for a nearest
+ vertex is an O(log(N)) operation, where N is the number of used vertices. You can ask a GridTools::Cache
+ object to return a tree that is compatible with the new function signature.
+ The previous version of this function had a cost that was O(N^2) when the point was not in the cell_hint
+ object.
+ <br>
+ (Luca Heltai, 2018/12/05)
+ </li>
+
+ <li>
+ New: Add LAPACKFullMatrix::transpose() to perform out-of-place transposition.
+ <br>
+ (Denis Davydov, 2018/12/05)
+ </li>
+
+ <li>
+ New: Add DEAL_II_LAPACK_WITH_MKL macro which will be set if Intel MKL is being used.
+ <br>
+ (Denis Davydov, 2018/12/05)
+ </li>
+
+ <li>
+ Changed: FESeries::Fourier::calculate and FESeries::Legendre::calculate
+ accept both Vector<float> and Vector<double> as input parameters for
+ local dof values.
+ <br>
+ (Marc Fehling, 2018/12/04)
+ </li>
+
+ <li>
+ New: Added entries to GridTools::Cache to build a vertices RTree, and a bounding boxes RTree.
+ <br>
+ (Luca Heltai, 2018/12/03)
+ </li>
+
+ <li>
+ New: Class EllipticalManifold<dim,spacedim> derived from ChartManifold,
+ valid only for dim=2 and spacedim=2. It maps points from a system of
+ cartesian coordinates to a system of elliptical coordinates and vice-versa.
+ <br>
+ (Stefano Dominici, 2018/11/30)
+ </li>
+
+ <li>
+ New: A new header <code>deal.II/base/undefine_macros.h</code> has been
+ added. This header, as the name suggests, undefines all deal.II macros that are
+ not prefixed with either <code>DEAL</code> or <code>deal</code>.
+ <br>
+ (David Wells, 2018/11/30)
+ </li>
+
+ <li>
+ Fixed: The MatrixFree::initialize() function would sometimes run into an
+ assertion when ghost faces occur on subdomain interfaces. This is now fixed.
+ <br>
+ (Martin Kronbichler, 2018/11/28)
+ </li>
+
+ <li>
+ New: Triangulation::n_faces, Triangulation::n_active_faces, and Triangulation::n_raw_faces now work also
+ in one dimension.
+ <br>
+ (Luca Heltai, 2018/11/22)
+ </li>
+
+ <li>
+ New: Add support for MPI when using CUDAWrappers::MatrixFree. This only works
+ with LinearAlgebra::distributed::Vector<Number, MemorySpace::CUDA>
+ <br>
+ (Bruno Turcksin, 2018/11/21)
+ </li>
+
+ <li>
+ Fixed: The TriaAccessor<0,dim,spacedim> and TriaAccessor<0,1,spacedim>
+ classes were missing member functions `get_triangulation()` and
+ `operator<()`. This prevented these objects from being stored in
+ `std::map`s, among other issues.
+ <br>
+ (Wolfgang Bangerth, Luca Heltai, 2018/11/20)
+ </li>
+
+ <li>
+ Fix bug with FEFaceValues initialization when used with the FE_NedelecSZ
+ <br>
+ (Alexander Grayver, 2018/11/19)
+ </li>
+
+ <li>
+ New: A new function GridTools::get_coarse_mesh_description has been added. This
+ function extracts the vertices, CellData, and SubCellData objects from a
+ Triangulation (i.e., it is the inverse of Triangulation::create_triangulation).
+ <br>
+ (David Wells, 2018/11/11)
+ </li>
+
+ <li>
+ Fixed: The operation FEEvaluation::read_dof_values performed invalid array
+ accesses with AVX512 vectorization in rare circumstances of particular 1d
+ meshes. This is now fixed.
+ <br>
+ (Martin Kronbichler, 2018/11/10)
+ </li>
+
+ <li>
+ Deprecated: The binary Tecplot output using the DataOutBase::tecplot_binary
+ format has been deprecated.
+ <br>
+ (Daniel Arndt, 2018/11/10)
+ </li>
+
+ <li>
+ New: GridOut::write_vtk and GridIn::read_vtk are now compatible with each other, and can be used to save
+ and restore a Triangulation with all manifold_ids and boundary_ids correctly saved.
+ This is now the only format that supports both boundary_id and manifold_id both in reading and writing.
+ <br>
+ (Luca Heltai, 2018/11/07)
+ </li>
+
+ <li>
+ Improved: The class ArrayView checks the memory location of the data it presents
+ and gained a template parameter indicating whether the data is stored in CPU or
+ CUDA memory.
+ <br>
+ (Daniel Arndt, 2018/11/04)
+ </li>
+
+ <li>
+ Improved: GridIn::read_msh also support version 4 of MSH file format
+ extracting the same information as for the older versions.
+ <br>
+ (Daniel Arndt, 2018/11/04)
+ </li>
+
+ <li>
+ Fixed: The grid generated by GridGenerator::truncated_cone now uses more level 0
+ cells to improve conditioning of cells when they are refined.
+ <br>
+ (David Wells, 2018/11/03)
+ </li>
+
+ <li>
+ Changed: The class Subscriptor and SmartPointer check for dangling pointers and
+ use-after-move. The destructor of Subscriptor doesn't signal an error when there
+ is still an object subscribed to it. Instead, validity is checked when
+ dereferencing the SmartPointer object.
+ <br>
+ (Daniel Arndt, 2018/11/02)
+ </li>
+
+ <li>
+ Fixed: SparsityPattern::begin() and DynamicSparsityPattern::begin()
+ resulted in an invalid iterator if the sparsity pattern was actually
+ empty.
+ <br>
+ (Wolfgang Bangerth, Denis Davydov, 2018/11/01)
+ </li>
+
+ <li>
+ New: Add Functions::IncrementalFunction which returns the difference in values of
+ a given function at two time steps.
+ <br>
+ (Denis Davydov, Jean-Paul Pelteret, 2018/10/05)
+ </li>
+
+ <li>
+ New: Classes FESeries::Fourier and FESeries::Legendre now take two
+ template arguments dim and spacedim, which allow them to use corresponding
+ hp::FECollection objects.
+ <br>
+ (Marc Fehling, 2018/10/17)
+ </li>
+
+ <li>
+ Fixed: The project_boundary_values_div_conforming() function now works correctly
+ with parallel::distributed::Triangulation.
+ <br>
+ (Jonathan Matthews, 2018/10/13)
+ </li>
+
+ <li>
+ New: Functions DoFAccessor::get_active_fe_indices() and
+ internal::DoFAccessorImplementation::get_active_vertex_fe_indices()
+ return all active finite element indices on the corresponding object.
+ <br>
+ (Marc Fehling, 2018/10/08)
+ </li>
+
+ <li>
+ New: Added RTree class and pack_rtree() function to create a boost::geometry::index::rtree from
+ containers and/or iterators of BoundingBox, Point, or Segment objects.
+ <br>
+ (Luca Heltai, 2018/10/06)
+ </li>
+
+ <li>
+ The computation of normal vectors on very small cells could fail. This is now fixed.
+ <br>
+ (Timo Heister, 2018/10/05)
+ </li>
+
+ <li>
+ The class VectorizedArray has gained support for the intrinsics of Altivec
+ of IBM Power processors.
+ <br>
+ (Martin Kronbichler, Bruno Turcksin, Sambit Das, 2018/10/05)
+ </li>
+
+ <li>
+ New: Add inverse_Hilbert_space_filling_curve() to map points in dim-dimensional
+ space to line index of the Hilbert space filling curve.
+ <br>
+ (Denis Davydov, 2018/10/05)
+ </li>
+
+ <li>
+ Deprecated: The Threads::n_existing_threads() and
+ Threads::this_thread_id() functions have been deprecated. There are
+ equivalent C++11 functions that provide the same kind of
+ functionality.
+ <br>
+ (Wolfgang Bangerth, 2018/10/05)
+ </li>
+
+ <li>
+ New: There is now a constructor of hp::QCollection that, like the
+ existing one of hp::FECollection, takes a variable number of
+ quadrature objects and creates a collection from it.
+ <br>
+ (Wolfgang Bangerth, 2018/10/04)
+ </li>
+
+ <li>
+ New: Class parallel::distributed::CellWeights allows to set the
+ weight of a cell depending on the number of degrees of freedom
+ associated with it. This guarantees an improved load balancing
+ in case a hp::DoFHandler is used on a p::d::Triangulation.
+ <br>
+ (Marc Fehling, 2018/10/01)
+ </li>
+
+ <li>
+ Removed: The Threads::DummyMutex, Threads::DummyConditionVariable, and
+ Threads::DummyThreadBarrier classes have been removed. These were only
+ used if deal.II was compiled without thread support, in which case
+ certain functionality from the TBB was not available. But the
+ implementations of the underlying functionality is now unconditionally
+ available via the C++11 standard library, and so we don't need the
+ dummy implementations any more.
+ <br>
+ (Wolfgang Bangerth, 2018/09/27)
+ </li>
+
+ <li>
+ Deprecated: The Threads::PosixThreadBarrier class and the
+ corresponding Threads::Barrier `using` declaration are deprecated. The
+ functionality implemented by these classes is easily replaced by C++11
+ functionality.
+ <br>
+ (Wolfgang Bangerth, 2018/09/27)
+ </li>
+
+ <li>
+ Deprecated: The Threads::ConditionVariable class is now
+ deprecated. Use `std::condition_variable` instead.
+ <br>
+ (Wolfgang Bangerth, 2018/09/27)
+ </li>
+
+ <li>
+ Deprecated: The Threads::Mutex class is now derived from
+ std::mutex. As a consequence, the Threads::Mutex::ScopedLock class is
+ now no longer necessary and is deprecated in favor of std::lock_guard
+ or any of the other similar classes provided by C++11 and
+ later. Similarly, the Threads::Mutex::acquire() and
+ Threads::Mutex::release() functions are deprecated in favor of the
+ corresponding functions in the std::mutex base class.
+ <br>
+ (Wolfgang Bangerth, 2018/09/27)
+ </li>
+
+ <li>
+ New: Support for complex values can be controlled using the CMake flag
+ DEAL_II_WITH_COMPLEX_VALUES.
+ <br>
+ (Daniel Arndt, 2019/09/26)
+ </li>
+
+ <li>
+ Fixed: The GridIn::read_abaqus() function now correctly reads in grids designed
+ for the co-dimension 1 case (specifically with dim == 2 and spacedim == 3).
+ <br>
+ (Yuxiang Wang, Jean-Paul Pelteret, 2018/09/20)
+ </li>
+
+ <li>
+ Fixed: MatrixFree::loop() would not zero a vector if all degrees of freedom
+ are constrained. This is now fixed.
+ <br>
+ (Martin Kronbichler, 2018/09/20)
+ </li>
+
+ <li>
+ New: Add optional flag to ParameterHandler to skip undefined
+ sections and parameters.
+ <br>
+ (Denis Davydov, 2018/09/20)
+ </li>
+
+ <li>
+ New: extend Patterns::Tools::Convert to work with ComponentMask
+ and std::unique_ptr<FunctionParser>.
+ <br>
+ (Denis Davydov, 2018/09/19)
+ </li>
+
+ <li>
+ New: SolverSelector gained a new constructor initializing the object completely.
+ <br>
+ (Daniel Arndt, 2018/09/17)
+ </li>
+
+ <li>
+ New: added the function TrilinosWrappers::MPI::Vector::import() to get data from a ReadWriteVector.
+ <br>
+ (Timo Heister, 2018/09/16)
+ </li>
+
+ <li>
+ New: Add line minimization functions.
+ <br>
+ (Denis Davydov, 2018/09/13)
+ </li>
+
+ <li>
+ Fixed: <code>make test</code> now runs in parallel automatically (i.e., it uses
+ a CMake command to determine the number of cores available). Since <code>make
+ test</code> just immediately invokes <code>ctest</code> as a subprocess, it is
+ currently not possible to link the number of globally available
+ <code>make</code> processes with the number of concurrently run tests; i.e.,
+ the number of cores <code>make test</code> uses is not changeable by users.
+ <br>
+ (David Wells, 2018/09/13)
+ </li>
+
+ <li>
+ Fixed: VectorTools::project_boundary_values_div_conforming works correctly
+ in case the DoFHandler object contains more than one FE_RaviartThomas element.
+ <br>
+ (Daniel Arndt, 2018/09/13)
+ </li>
+
+ <li>
+ New: The function DoFRenumbering::hierarchical() is now also available
+ for hp::DoFHandler objects, as well as for DoFHandlers build on
+ triangulations with `dim != spacedim`.
+ <br>
+ (Wolfgang Bangerth, 2018/09/06)
+ </li>
+
+ <li>
+ Added: New function
+ Utilities::MPI::compute_n_point_to_point_communications()
+ is implemented to be used for computing number of processes
+ in an MPI universe to expect communication from.
+ <br>
+ (Eldar Khattatov, 2018/09/04)
+ </li>
+
+ <li>
+ New: Utilities::CUDA::allocate_device_data() and
+ Utilities::CUDA::delete_device_data() help to manage data on CUDA devices
+ using std::unique_ptr.
+ <br>
+ (Daniel Arndt, 2018/09/01)
+ </li>
+
+ <li>
+ Fixed: Member function AffineConstraints::add_entries() now skips already
+ existing entries.
+ <br>
+ (Dustin Kumor, 2018/08/24)
+ </li>
+
+ <li>
+ Fixed: TrilinosWrappers::SparseMatrix::mmult() sometimes gave the wrong result
+ in parallel.
+ <br>
+ (Damien Lebrun-Grandie and Bruno Turcksin, 2018/08/22)
+ </li>
+
+ <li>
+ Fixed: The function Particles::ParticleAccessor::serialize() was
+ declared but not implemented. This is now fixed.
+ <br>
+ (Wolfgang Bangerth, 2018/08/21)
+ </li>
+
+ <li>
+ New: Add a mask argument to filter out some vector lanes in FEEvaluationBase
+ This is required for local time stepping using the MatrixFree framework,
+ because some cells of batches must be excluded from read/write operations
+ when operating on different time steps compared to their neighbor cells.
+ <br>
+ (Svenja Schoeder, 2018/08/21)
+ </li>
+
+ <li>
+ New: Table and FullMatrix now have complete (both mutable and const)
+ random-access iterators.
+ <br>
+ (David Wells, 2018/08/20)
+ </li>
+
+ <li>
+ New: CUDAWrappers::PreconditionILU and CUDAWrappers::PreconditionIC can be used
+ for preconditioning CUDAWrappers::SparseMatrix objects.
+ <br>
+ (Daniel Arndt, 2018/08/20)
+ </li>
+
+ <li>
+ New: There are nothrow versions of AssertCUDA and AssertCusparse, namely
+ AssertNothrowCUDA and AssertNothrowCusparse.
+ <br>
+ (Daniel Arndt, 2018/08/20)
+ </li>
+
+ <li>
+ New: There are new methods CUDAWrappers::SparseMatrix::print() and
+ CUDAWrappers::SparseMatrix::print_formatted(). Additionally,
+ CUDAWrappers::SparseMatrix gained a move assignment operator.
+ <br>
+ (Daniel Arndt, 2018/08/20)
+ </li>
+
+ <li>
+ Fixed: Throwing an exception in Assert doesn't slice objects derived from
+ ExceptionBase anymore.
+ <br>
+ (Daniel Arndt, 2018/08/17)
+ </li>
+
+ <li>
+ New: There is LinearAlgebra::CUDAWrappers::Vector::norm_sqr() for computing
+ the squared l2-norm and LinearAlgebra::CUDAWrappers::Vector::swap()
+ for swapping two vectors.
+ <br>
+ (Daniel Arndt, 2018/08/17)
+ </li>
+
+ <li>
+ Fixed: CUDAWrappers::Vector performs now a deep copy instead of a shallow copy
+ in its copy assignment operator.
+ <br>
+ (Daniel Arndt, 2018/08/16)
+ </li>
+
+ <li>
+ Fixed: MGConstrainedDofs::initialize(...) now handles refinement edges across periodic boundaries correctly.
+ <br>
+ (Alexander Knieps, 2018/08/13)
+ </li>
+
+ <li>
+ Fixed: Bug using ScaLAPACKMatrix::save() and load() for configurations with pHDF5 in combination with serial HDF5 matrices from user code.
+ <br>
+ (Benjamin Brands, 2018/08/10)
+ </li>
+
+ <li>
+ Improved: Triangulation::prepare_coarsening_and_refinement also takes care of
+ limiting the level difference across periodic boundary faces.
+ <br>
+ (Daniel Arndt, Stefan Kaessmair, 2018/08/09)
+ </li>
+
+ <li>
+ New: The new function
+ MatrixFreeOperators::CellwiseInverseMassMatrix::transform_from_q_points_to_basis()
+ enables to change the basis from a representation in quadrature points into
+ the original basis of FEEvaluation.
+ <br>
+ (Martin Kronbichler, 2018/08/06)
+ </li>
+
+ <li>
+ Improved: FEEvaluation and FEFaceEvaluation have gained support for
+ renumbering of degrees of freedom for fully discontinuous finite element
+ spaces which can improve performance by around 10 percent.
+ <br>
+ (Martin Kronbichler, 2018/08/06)
+ </li>
+
+ <li>
+ New: Add support for constraint when using matrix-free on GPU. Note you cannot
+ set constraints in 2D if the degree of the finite element is even.
+ <br>
+ (Bruno Turcksin, 2018/08/06)
+ </li>
+
+ <li>
+ New: A convenience function Triangulation::active_face_iterators() (which is like
+ Triangulation::active_cell_iterators(), but for faces) has been added.
+ <br>
+ (David Wells, 2018/08/05)
+ </li>
+
+ <li>
+ Fixed: Minor issues when using matrix-free cell categorization
+ with multi-grid operators.
+ <br>
+ (Denis Davydov, 2018/08/02)
+ </li>
+
+ <li>
+ Fixed: The import function for LinearAlgebra::distributed::Vector would fail if
+ the IndexSet of the ReadWriteVector has no locally owned element
+ <br>
+ (Bruno Turcksin, 2018/08/02)
+ </li>
+
+ <li>
+ New: GridGenerator::merge_triangulations can merge multiple
+ Triangulation objects at once.
+ <br>
+ (Daniel Arndt, 2018/08/01)
+ </li>
+
+ <li>
+ New: LinearAlgebra::distributed::Vector has an extra template parameter
+ MemorySpace. This new template parameter can be used if the data should be
+ allocated on the host or on the device.
+ <br>
+ (Bruno Turcksin, 2018/08/01)
+ </li>
+
+ <li>
+ Added support for high-order VTU output by using newly
+ introduced Lagrange VTK cells.
+ <br>
+ (Alexander Grayver, 2018/08/01)
+ </li>
+
+ <li>
+ Added support for high-order VTK output by using newly
+ introduced Lagrange VTK cells.
+ <br>
+ (Alexander Grayver, 2018/07/27)
+ </li>
+
+ <li>
+ New: Add FiniteSizeHistory class to store a finite-size history of objects.
+ <br>
+ (Denis Davydov, 2018/07/26)
+ </li>
+
+ <li>
+ Deprecate project_boundary_values_curl_conforming in favor
+ of project_boundary_values_curl_conforming_l2. The former
+ has a number of known limitations and bugs.
+ <br>
+ (Alexander Grayver, 2018/07/26)
+ </li>
+
+ <li>
+ New: Add boost adaptor for dealii::BoundingBox.
+ <br>
+ (Luca Heltai, 2018/07/24)
+ </li>
+
+ <li>
+ New: Added geometry adaptors for boost.
+ <br>
+ (Luca Heltai, Bruno Turcksin, 2018/07/22)
+ </li>
+
+ <li>
+ New: Add new constructor type for FunctionParser class.
+ <br>
+ (Luca Heltai, 2018/07/21)
+ </li>
+
+ <li>
+ Fixed: hp::DoFHandler::distribute_dofs() now works on
+ parallel::distributed::Triangulation<3> objects that
+ contain artificial cells.
+ <br>
+ (Marc Fehling, 2018/07/20)
+ </li>
+
+ <li>
+ Changed: The Subscriptor class has been made thread-safe, and its behavior in
+ debug and release modes are now identical. Although this makes subscription and
+ un-subscription slightly more expensive in release mode, debugging should be
+ easier overall.
+ <br>
+ (Jean-Paul Pelteret, 2018/07/15)
+ </li>
+
+ <li>
+ New: A new function GridGenerator::concentric_hyper_shells has been added. This
+ function generates a grid comprised of shells of varying widths, where the
+ shells near the center are much thinner than those near the outer boundary.
+ <br>
+ (David Wells, 2018/07/15)
+ </li>
+
+ <li>
+ Fixed: Iterating over the entries of a TrilinosWrappers::SparsityPattern object
+ in parallel and after calling TrilinosWrappers::SparsityPattern::compress()
+ works now.
+ <br>
+ (Mathias Anselmann, Daniel Arndt, 2018/07/11)
+ </li>
+
+ <li>
+ Fixed: GridTools::delete_duplicated_vertices also treats the SubCellData
+ object correctly when renumbering the vertices.
+ <br>
+ (Daniel Arndt, 2018/07/08)
+ </li>
+
+ <li>
+ New: GridGenerator::merge_triangulations gained an option to copy manifold ids.
+ <br>
+ (Daniel Arndt, 2018/07/08)
+ </li>
+
+ <li>
+ New: Add GridGenerator::plate_with_a_hole() that generates a
+ rectangular plate with an (offset) cylindrical hole.
+ <br>
+ (Denis Davydov, 2018/06/21)
+ </li>
+
+ <li>
+ Fixed: The functions FEFaceEvaluation::evaluate and
+ FEFaceEvaluation::integrate would access invalid memory when only evaluating
+ function values and using multiple components in 1D. This is now fixed.
+ <br>
+ (Martin Kronbichler, 2018/07/04)
+ </li>
+
+ <li>
+ New: The class MatrixFreeFunctions::CellwiseInverseMassMatrix can now also be
+ used in 1D.
+ <br>
+ (Martin Kronbichler, 2018/07/04)
+ </li>
+
+ <li>
+ New: Add support for output of tensor-valued data in
+ DataOut::write_vtu().
+ <br>
+ (Denis Davydov, 2018/06/21)
+ </li>
+
+ <li>
+ New: Extend get_vector_data_ranges() to return extra element in
+ the tuple to represent DataComponentInterpretation. The functions
+ were renamed to get_nonscalar_data_ranges().
+ <br>
+ (Denis Davydov, 2018/06/21)
+ </li>
+
+ <li>
+ Fixed: FETools::back_interpolate can be used
+ for TrilinosWrappers::MPI::BlockVector.
+ <br>
+ (Daniel Arndt, 2018/06/20)
+ </li>
+
+ <li>
+ Changed: Calling GridGenerator::refine_and_coarsen_fixed_fraction()
+ and GridGenerator::refine_and_coarsen_fixed_fraction() with values for
+ the coarsen and refine fractions that added to 1.0 in exact
+ arithmetic, but something slightly larger in floating point
+ arithmetic, resulted in an error. These functions are now slightly
+ more relaxed in that they allow arguments that add to 1.0 up to a
+ small floating point round off error.
+ <br>
+ (Wolfgang Bangerth, 2018/06/18)
+ </li>
+
+ <li>
+ New: The LinearAlgebra::distributed::Vector::compress() function has
+ gained two new combine operations VectorOperation::min and
+ VectorOperation::max to define the entry at the owning processor as
+ the minimum/maximum of its own value and the one coming from a ghost.
+ <br>
+ (Svenja Schoeder, 2018/06/18)
+ </li>
+
+ <li>
+ Fixed: TrilinosWrappers::MPI::Vector::reinit check now checks if
+ parallel_partitioner is_ascending_and_one_to_one before calling
+ make_trilinos_map because make_trilinos_map may be able to make
+ a linear map if is_ascending_and_one_to_one is true.
+ <br>
+ (Joshua Hanophy, 2018/06/16)
+ </li>
+
+ <li>
+ Fixed: The eigenvalue approximation in SolverGMRES failed if no iterations
+ were performed. Now, there is simply no output in this case.
+ <br>
+ (Daniel Arndt, 2018/06/15)
+ </li>
+
+ <li>
+ Bugfix: Fixed bugs for TrilinosWrapper::SparseMatrix::add(factor, other_matrix)
+ and TrilinosWrapper::SparseMatrix::copy_from(other_matrix) for the case of
+ non-contiguous rows.
+ <br>
+ (Uwe Koecher, 2018/06/14)
+ </li>
+
+ <li>
+ Fixed: Mismatched numbers of components between the exact solution and
+ underlying FE in Step-51.
+ <br>
+ (Pi-Yueh Chuang, 2018/06/14)
+ </li>
+
+ <li>
+ Bugfix: Fixed a bug where VectorDataExchange::ghosts_were_set was
+ not set inside MatrixFree::cell_loop() for block vectors
+ with many blocks.
+ <br>
+ (Denis Davydov, 2018/06/12)
+ </li>
+
+ <li>
+ Fixed: CMake now supports again in-source builds (This functionality was
+ accidentally broken in the previous release).
+ <br>
+ (Matthias Maier, 2018/06/11)
+ </li>
+
+ <li>
+ Deprecated: FunctionMap is deprecated. It is recommended to
+ use the aliased type directly.
+ <br>
+ (Daniel Arndt, 2018/06/11)
+ </li>
+
+ <li>
+ Fixed: BlockLinearOperator::vmult(), BlockLinearOperator::vmult_add(),
+ BlockLinearOperator::Tvmult() and BlockLinearOperator::Tvmult_add()
+ can be used with identical source and destination vectors.
+ <br>
+ (Daniel Arndt, 2018/06/10)
+ </li>
+
+ <li>
+ Improved: Extend ScaLAPACKMatrix::invert() to use pXtrtri for inversion of triangular matrices.
+ <br>
+ (Sambit Das, 2018/06/06)
+ </li>
+
+ <li>
+ New: TimerOutput::cpu_and_wall_times_grouped will print CPU and
+ wallclock time in a single table.
+ <br>
+ (Denis Davydov, 2018/05/29)
+ </li>
+
+ <li>
+ Improved: TimerOutput now dynamically adjust to the the width of Section column.
+ <br>
+ (Denis Davydov, 2018/05/29)
+ </li>
+
+ <li>
+ New: The function GridTools::find_all_active_cells_around_point() returns a
+ list of all cells around a point, rather than only a single one for the old
+ GridTools::find_active_cell_around_point.
+ <br>
+ (Martin Kronbichler, Niklas Fehn, 2018/05/28)
+ </li>
+
+ <li>
+ Improved: MatrixFree::cell_loop() and MatrixFree::loop() directly use
+ LinearAlgebra::distributed::BlockVector::update_ghost_values() and
+ LinearAlgebra::distributed::BlockVector::compress() calls on block vectors
+ with many blocks, rather than splitting each method into two parts for
+ overlapping communication and computation. The latter is inefficient as soon
+ as too many MPI requests are in flight.
+ <br>
+ (Martin Kronbichler, Denis Davydov, 2018/05/24)
+ </li>
+
+ <li>
+ Fixed: Step-16 was broken caused by uninitialized variables, it is now fixed.
+ <br>
+ (Ce Qin, 2018/05/21)
+ </li>
+
+ <li>
+ Improved: MGTransferPrebuilt now supports
+ PETScWrappers::MPI::Vector and
+ PETScWrappers::MPI::SparseMatrix.
+ <br>
+ (Alexander Knieps, 2018/05/21)
+ </li>
+
+ <li>
+ Fixed: DoFTools::make_flux_sparsity_pattern was accessing invalid dof indices
+ in case neighboring cells were not using FiniteElement objects with the same
+ number of degrees of freedom. This is fixed now.
+ <br>
+ (Daniel Arndt, 2018/05/19)
+ </li>
+
+ <li>
+ Fixed: Two invalid off-by-one data accesses in the initialization of
+ MatrixFree with face data enabled, that appeared in some rare cases on certain
+ configurations of processors, have been fixed.
+ <br>
+ (Daniel Arndt, Martin Kronbichler, 2018/05/18)
+ </li>
+
+ <li>
+ New: Classes that act as an interface to the drivers of internally supported automatic
+ differentiation libraries (ADOL-C and Sacado) have been implemented. A brief summary
+ of what these classes are used for is given in the @ref auto_symb_diff module.
+ <br>
+ (Jean-Paul Pelteret, 2017/11/18)
+ </li>
+
+</ol>
+
+*/
projects / dealii.git / commitdiff