]> https://gitweb.dealii.org/ - dealii.git/log
dealii.git
2 years agoMerge pull request #13195 from kronbichler/step-67-movie
Wolfgang Bangerth [Sat, 8 Jan 2022 04:40:41 +0000 (21:40 -0700)]
Merge pull request #13195 from kronbichler/step-67-movie

Add movie to step-67 tutorial program

2 years agoMerge pull request #13188 from bangerth/43-b
Martin Kronbichler [Fri, 7 Jan 2022 20:28:38 +0000 (21:28 +0100)]
Merge pull request #13188 from bangerth/43-b

Document a part of step-43 that confused @tjhei.

2 years agoAdd movie to step-67 tutorial program 13195/head
Martin Kronbichler [Fri, 7 Jan 2022 20:25:41 +0000 (21:25 +0100)]
Add movie to step-67 tutorial program

2 years agoMerge pull request #13185 from bangerth/inst
David Wells [Fri, 7 Jan 2022 20:09:05 +0000 (15:09 -0500)]
Merge pull request #13185 from bangerth/inst

Provide some overloads and instantiations

2 years agoMerge pull request #13186 from bangerth/43
Peter Munch [Fri, 7 Jan 2022 17:30:28 +0000 (18:30 +0100)]
Merge pull request #13186 from bangerth/43

Use better variable names in step-43.

2 years agoMerge pull request #13187 from peterrum/rpe_marked_vertices_false
Peter Munch [Fri, 7 Jan 2022 17:29:51 +0000 (18:29 +0100)]
Merge pull request #13187 from peterrum/rpe_marked_vertices_false

Fix RemotePointEvalution::marked_vertices for vectors with only false

2 years agoMerge pull request #13191 from bangerth/21
Peter Munch [Fri, 7 Jan 2022 17:29:40 +0000 (18:29 +0100)]
Merge pull request #13191 from bangerth/21

Simplify initialization of block systems in step-21.

2 years agoMerge pull request #13190 from bangerth/20
Peter Munch [Fri, 7 Jan 2022 17:29:18 +0000 (18:29 +0100)]
Merge pull request #13190 from bangerth/20

Simplify initialization of block systems in step-20

2 years agoMerge pull request #13189 from bangerth/52
Peter Munch [Fri, 7 Jan 2022 17:28:52 +0000 (18:28 +0100)]
Merge pull request #13189 from bangerth/52

Fix symbol confusion in step-52.

2 years agoSimplify initialization of block systems in step-21. 13191/head
Wolfgang Bangerth [Fri, 7 Jan 2022 11:03:27 +0000 (04:03 -0700)]
Simplify initialization of block systems in step-21.

2 years agoSimplify initialization of block systems. 13190/head
Wolfgang Bangerth [Fri, 7 Jan 2022 10:53:46 +0000 (03:53 -0700)]
Simplify initialization of block systems.

2 years agoFix symbol confusion in step-52. 13189/head
Wolfgang Bangerth [Fri, 7 Jan 2022 10:41:31 +0000 (03:41 -0700)]
Fix symbol confusion in step-52.

2 years agoFix RemotePointEvalution::marked_vertices for vectors with only false 13187/head
Peter Munch [Fri, 7 Jan 2022 10:00:11 +0000 (11:00 +0100)]
Fix RemotePointEvalution::marked_vertices for vectors with only false

2 years agoDocument a part of step-43 that confused @tjhei. 13188/head
Wolfgang Bangerth [Fri, 7 Jan 2022 10:06:52 +0000 (03:06 -0700)]
Document a part of step-43 that confused @tjhei.

2 years agoAdd a changelog entry. 13186/head
Wolfgang Bangerth [Fri, 7 Jan 2022 10:06:21 +0000 (03:06 -0700)]
Add a changelog entry.

2 years agoUse better variable names in step-43.
Wolfgang Bangerth [Fri, 7 Jan 2022 09:49:22 +0000 (02:49 -0700)]
Use better variable names in step-43.

2 years agoAlso instantiate TriaAccessor<0,1,spacedim>. 13185/head
Wolfgang Bangerth [Tue, 4 Jan 2022 20:42:00 +0000 (13:42 -0700)]
Also instantiate TriaAccessor<0,1,spacedim>.

2 years agoInstantiate TriaAccessor<0,1,spacedim>.
Wolfgang Bangerth [Wed, 29 Dec 2021 16:36:58 +0000 (09:36 -0700)]
Instantiate TriaAccessor<0,1,spacedim>.

2 years agoProvide an overload for TriaAccess<0,1,spacedim>::copy_from().
Wolfgang Bangerth [Wed, 29 Dec 2021 16:36:41 +0000 (09:36 -0700)]
Provide an overload for TriaAccess<0,1,spacedim>::copy_from().

2 years agoMerge pull request #13183 from bangerth/simplify
Matthias Maier [Fri, 7 Jan 2022 06:40:04 +0000 (00:40 -0600)]
Merge pull request #13183 from bangerth/simplify

Simplify some code.

2 years agoMerge pull request #13182 from drwells/add-index-checks
Matthias Maier [Fri, 7 Jan 2022 06:39:54 +0000 (00:39 -0600)]
Merge pull request #13182 from drwells/add-index-checks

Add some more index range checks.

2 years agoMerge pull request #13178 from peterrum/rpe_marked_vertices
Matthias Maier [Fri, 7 Jan 2022 06:39:41 +0000 (00:39 -0600)]
Merge pull request #13178 from peterrum/rpe_marked_vertices

RemotePointEvalution: pass marked_vertices

2 years agoSimplify some code. 13183/head
Wolfgang Bangerth [Tue, 4 Jan 2022 20:31:59 +0000 (13:31 -0700)]
Simplify some code.

2 years agoMerge pull request #13177 from peterrum/point_values_fix_types_2
Wolfgang Bangerth [Thu, 6 Jan 2022 21:41:38 +0000 (14:41 -0700)]
Merge pull request #13177 from peterrum/point_values_fix_types_2

FEPointEvaluation: fix types for multiple components

2 years agoMerge pull request #13176 from tamiko/add_changelog
Wolfgang Bangerth [Thu, 6 Jan 2022 21:36:34 +0000 (14:36 -0700)]
Merge pull request #13176 from tamiko/add_changelog

OneAPI compatibility: fix most of the API incompatibilities

2 years agoMerge pull request #13147 from bangerth/mpi
David Wells [Thu, 6 Jan 2022 20:34:35 +0000 (15:34 -0500)]
Merge pull request #13147 from bangerth/mpi

Add a bit of documentation to MPI::compute_point_to_point_communication_pattern()

2 years agoAdd some more index range checks. 13182/head
David Wells [Thu, 6 Jan 2022 20:30:30 +0000 (15:30 -0500)]
Add some more index range checks.

We presently segmentation fault with #13179 (the draft intel oneAPI patch) here
since ptr and data are both empty.

2 years agoMerge pull request #13174 from bangerth/44
Jean-Paul Pelteret [Thu, 6 Jan 2022 18:24:54 +0000 (19:24 +0100)]
Merge pull request #13174 from bangerth/44

Update step-44 documentation.

2 years agoRemotePointEvalution: pass marked_vertices 13178/head
Peter Munch [Thu, 6 Jan 2022 12:47:27 +0000 (13:47 +0100)]
RemotePointEvalution: pass marked_vertices

2 years agoMerge pull request #13168 from bangerth/fe-face
David Wells [Thu, 6 Jan 2022 16:16:11 +0000 (11:16 -0500)]
Merge pull request #13168 from bangerth/fe-face

Fix a bug in FE_Face.

2 years agoprovide hash operator to tbb::concurrent_unordered_map 13176/head
Matthias Maier [Thu, 6 Jan 2022 14:15:23 +0000 (08:15 -0600)]
provide hash operator to tbb::concurrent_unordered_map

2 years agoport workstream.h to oneAPI
Matthias Maier [Thu, 6 Jan 2022 13:13:41 +0000 (07:13 -0600)]
port workstream.h to oneAPI

2 years agoport multithread_info.cc to oneAPI
Matthias Maier [Thu, 6 Jan 2022 12:36:58 +0000 (06:36 -0600)]
port multithread_info.cc to oneAPI

2 years agoMerge pull request #13175 from bangerth/changelog
Daniel Arndt [Thu, 6 Jan 2022 14:25:59 +0000 (09:25 -0500)]
Merge pull request #13175 from bangerth/changelog

2 years agoFEPointEvaluation: fix types for multiple components 13177/head
Peter Munch [Thu, 6 Jan 2022 12:45:28 +0000 (13:45 +0100)]
FEPointEvaluation: fix types for multiple components

2 years agoAdd a changelog entry. 13175/head
Wolfgang Bangerth [Thu, 6 Jan 2022 11:54:04 +0000 (04:54 -0700)]
Add a changelog entry.

2 years agoMerge pull request #13152 from peterrum/PreconditionRelaxation_refactoring
Matthias Maier [Thu, 6 Jan 2022 11:51:29 +0000 (05:51 -0600)]
Merge pull request #13152 from peterrum/PreconditionRelaxation_refactoring

Refactor PreconditionRelaxation

2 years agoMerge pull request #13172 from bangerth/length
Matthias Maier [Thu, 6 Jan 2022 11:50:27 +0000 (05:50 -0600)]
Merge pull request #13172 from bangerth/length

Use std::string::size() instead of std::string::length().

2 years agoUpdate step-44 documentation. 13174/head
Wolfgang Bangerth [Thu, 6 Jan 2022 11:49:17 +0000 (04:49 -0700)]
Update step-44 documentation.

2 years agoUpdate test output. 13168/head
Wolfgang Bangerth [Thu, 6 Jan 2022 11:47:44 +0000 (04:47 -0700)]
Update test output.

2 years agoMerge pull request #13173 from peterrum/point_values_fix_types
Wolfgang Bangerth [Thu, 6 Jan 2022 11:03:58 +0000 (04:03 -0700)]
Merge pull request #13173 from peterrum/point_values_fix_types

VectorTools::point_values(): fix types

2 years agoMerge pull request #13170 from jppelteret/filtered_iterator_test_01
Wolfgang Bangerth [Thu, 6 Jan 2022 10:50:35 +0000 (03:50 -0700)]
Merge pull request #13170 from jppelteret/filtered_iterator_test_01

Add some more tests for iterator filters

2 years agoAdd a changelog entry 13170/head
Jean-Paul Pelteret [Wed, 5 Jan 2022 19:09:22 +0000 (20:09 +0100)]
Add a changelog entry

2 years agoAdd test for filtered iterators and FEInterfaceValues
Jean-Paul Pelteret [Wed, 5 Jan 2022 18:25:04 +0000 (19:25 +0100)]
Add test for filtered iterators and FEInterfaceValues

2 years agoMake FEInterfaceValues compatible with filtered iterators
Jean-Paul Pelteret [Wed, 5 Jan 2022 19:05:20 +0000 (20:05 +0100)]
Make FEInterfaceValues compatible with filtered iterators

2 years agoAdd some more tests for iterator filters
Jean-Paul Pelteret [Wed, 5 Jan 2022 18:15:21 +0000 (19:15 +0100)]
Add some more tests for iterator filters

2 years agoVectorTools::point_values(): fix types 13173/head
Peter Munch [Thu, 6 Jan 2022 07:45:12 +0000 (08:45 +0100)]
VectorTools::point_values(): fix types

2 years agoUse std::string::size() instead of std::string::length(). 13172/head
Wolfgang Bangerth [Tue, 4 Jan 2022 20:27:57 +0000 (13:27 -0700)]
Use std::string::size() instead of std::string::length().

2 years agoFix a bug in FE_Face.
Wolfgang Bangerth [Tue, 4 Jan 2022 20:27:37 +0000 (13:27 -0700)]
Fix a bug in FE_Face.

2 years agoMerge pull request #13167 from bangerth/isspace
Daniel Arndt [Wed, 5 Jan 2022 14:51:26 +0000 (09:51 -0500)]
Merge pull request #13167 from bangerth/isspace

2 years agoMerge pull request #13165 from drwells/fix-boost-1.78
Matthias Maier [Tue, 4 Jan 2022 21:45:41 +0000 (15:45 -0600)]
Merge pull request #13165 from drwells/fix-boost-1.78

Fix compilation with boost 1.78.

2 years agoSimplify some code. 13167/head
Wolfgang Bangerth [Tue, 4 Jan 2022 19:56:53 +0000 (12:56 -0700)]
Simplify some code.

2 years agoMerge pull request #13150 from masterleinad/avoid_implicit_bool_conversions
Wolfgang Bangerth [Tue, 4 Jan 2022 19:54:09 +0000 (12:54 -0700)]
Merge pull request #13150 from masterleinad/avoid_implicit_bool_conversions

Avoid implicit bool conversions

2 years agoRefactor PreconditionRelaxation 13152/head
Peter Munch [Wed, 29 Dec 2021 18:23:51 +0000 (19:23 +0100)]
Refactor PreconditionRelaxation

2 years agoRevert "Boost: Disallow version 1.77 due to multiple unresolved upstream bugs" 13165/head
David Wells [Tue, 4 Jan 2022 19:20:47 +0000 (14:20 -0500)]
Revert "Boost: Disallow version 1.77 due to multiple unresolved upstream bugs"

This reverts commit badbdc83517e2ea35c5b8650646b66a2f4f5be2c.

2 years agoFix compilation with boost 1.78.
David Wells [Tue, 4 Jan 2022 17:46:30 +0000 (12:46 -0500)]
Fix compilation with boost 1.78.

I bisected (fortunately Boost.Geometry a header-only library so adding the
include directory sufficed) and
https://github.com/boostorg/geometry/commit/6eb9e238bcb37e26dc31d16acf826784a2ba30f4
is where this problem starts for us. See also
https://github.com/boostorg/geometry/issues/792 - the easiest fix for all such
issues is to just include the project header `boost/geometry/geometry.hpp`.

In this particular case, if you look at the commit which causes grid_tools.cc
fails to compile, its because we were relying on some implicit includes. In
particular, we need the distance header to find the distance between points and
boxes, but that was previously included in another file.

2 years agoMerge pull request #13164 from bangerth/continuous-dev
David Wells [Tue, 4 Jan 2022 18:19:10 +0000 (13:19 -0500)]
Merge pull request #13164 from bangerth/continuous-dev

Parallelize more operations in the UMFPACK interfaces.

2 years agoChange type of line_orientation in standard_vs_true_line_orientation 13150/head
Daniel Arndt [Wed, 29 Dec 2021 22:26:31 +0000 (17:26 -0500)]
Change type of line_orientation in standard_vs_true_line_orientation

2 years agoAvoid implicit bool conversions
Daniel Arndt [Thu, 20 May 2021 18:19:19 +0000 (14:19 -0400)]
Avoid implicit bool conversions

2 years agoParallelize more operations in the UMFPACK interfaces. 13164/head
Wolfgang Bangerth [Sat, 1 Jan 2022 11:56:55 +0000 (04:56 -0700)]
Parallelize more operations in the UMFPACK interfaces.

2 years agoMerge pull request #12968 from juleoc02/trilinos_non_negative
Matthias Maier [Tue, 4 Jan 2022 12:26:58 +0000 (06:26 -0600)]
Merge pull request #12968 from juleoc02/trilinos_non_negative

Trilinos parallel is_non_negative() function

2 years agoMerge pull request #12987 from bangerth/create-big-mpi
Matthias Maier [Tue, 4 Jan 2022 12:23:39 +0000 (06:23 -0600)]
Merge pull request #12987 from bangerth/create-big-mpi

Make sure MPI BigData objects are always destroyed.

2 years agoMerge pull request #13082 from bangerth/npx
Matthias Maier [Tue, 4 Jan 2022 12:23:22 +0000 (06:23 -0600)]
Merge pull request #13082 from bangerth/npx

Better document the NPX algorithm.

2 years agoMerge pull request #13141 from bangerth/test
Matthias Maier [Tue, 4 Jan 2022 12:20:38 +0000 (06:20 -0600)]
Merge pull request #13141 from bangerth/test

Add assertions and a test

2 years agoMerge pull request #13163 from adamqc/fix-cuda-compilation-error
Matthias Maier [Tue, 4 Jan 2022 12:19:33 +0000 (06:19 -0600)]
Merge pull request #13163 from adamqc/fix-cuda-compilation-error

Fix compilation error.

2 years agoMerge pull request #13155 from bangerth/parallelize
Matthias Maier [Tue, 4 Jan 2022 10:55:06 +0000 (04:55 -0600)]
Merge pull request #13155 from bangerth/parallelize

Parallelize some functions setting up UMFPACK.

2 years agoMerge pull request #13156 from bangerth/parallel-3
Matthias Maier [Tue, 4 Jan 2022 10:50:06 +0000 (04:50 -0600)]
Merge pull request #13156 from bangerth/parallel-3

Also simplify parallel::accumulate_from_subranges() with lambdas.

2 years agoMerge pull request #13157 from bangerth/umfpack-2
Matthias Maier [Tue, 4 Jan 2022 10:47:59 +0000 (04:47 -0600)]
Merge pull request #13157 from bangerth/umfpack-2

Avoid a temp array in the UMFPACK interfaces.

2 years agoFix compilation error. 13163/head
Ce Qin [Tue, 4 Jan 2022 07:38:36 +0000 (15:38 +0800)]
Fix compilation error.

2 years agoMerge pull request #13162 from masterleinad/chnage_standard_vs_true_line_orientation
David Wells [Mon, 3 Jan 2022 19:19:19 +0000 (14:19 -0500)]
Merge pull request #13162 from masterleinad/chnage_standard_vs_true_line_orientation

Change type of line_orientation in standard_vs_true_line_orientation

2 years agoChange type of line_orientation in standard_vs_true_line_orientation 13162/head
Daniel Arndt [Wed, 29 Dec 2021 22:26:31 +0000 (17:26 -0500)]
Change type of line_orientation in standard_vs_true_line_orientation

2 years agoMerge pull request #11358 from tjhei/ci_windows_cmake_check
Daniel Arndt [Mon, 3 Jan 2022 14:11:15 +0000 (09:11 -0500)]
Merge pull request #11358 from tjhei/ci_windows_cmake_check

2 years agoMerge pull request #13161 from jppelteret/scratch_data_05
Wolfgang Bangerth [Sat, 1 Jan 2022 20:27:51 +0000 (13:27 -0700)]
Merge pull request #13161 from jppelteret/scratch_data_05

Extend ScratchData's public interface with getter methods to access private data

2 years agoSelect 64bit windows platform 11358/head
Timo Heister [Thu, 10 Dec 2020 23:23:08 +0000 (18:23 -0500)]
Select 64bit windows platform

2 years agoExtend ScratchData's public interface with getter methods to access private data 13161/head
Jean-Paul Pelteret [Fri, 31 Dec 2021 20:38:48 +0000 (21:38 +0100)]
Extend ScratchData's public interface with getter methods to access private data

2 years agoMerge pull request #13160 from tjhei/step-74-doi
Luca Heltai [Fri, 31 Dec 2021 18:17:23 +0000 (19:17 +0100)]
Merge pull request #13160 from tjhei/step-74-doi

step-74: add DOI

2 years agostep-74: add DOI 13160/head
Timo Heister [Fri, 31 Dec 2021 17:03:31 +0000 (12:03 -0500)]
step-74: add DOI

2 years agoMerge pull request #13153 from bangerth/parallel-2
Martin Kronbichler [Thu, 30 Dec 2021 20:55:43 +0000 (21:55 +0100)]
Merge pull request #13153 from bangerth/parallel-2

Simplify more code in parallel.h via lambda functions.

2 years agoMerge pull request #13151 from bangerth/parallel-for
Martin Kronbichler [Thu, 30 Dec 2021 20:53:59 +0000 (21:53 +0100)]
Merge pull request #13151 from bangerth/parallel-for

Simplify code by using lambda functions.

2 years agoAvoid a temp array in the UMFPACK interfaces. 13157/head
Wolfgang Bangerth [Thu, 30 Dec 2021 18:00:06 +0000 (11:00 -0700)]
Avoid a temp array in the UMFPACK interfaces.

2 years agoMerge pull request #13154 from jppelteret/iterator_filter_predicates_01
Luca Heltai [Thu, 30 Dec 2021 17:53:51 +0000 (18:53 +0100)]
Merge pull request #13154 from jppelteret/iterator_filter_predicates_01

Iterator filter predicates for boundary and manifold IDs

2 years agoAlso simplify parallel::accumulate_from_subranges() with lambdas. 13156/head
Wolfgang Bangerth [Thu, 30 Dec 2021 16:51:03 +0000 (09:51 -0700)]
Also simplify parallel::accumulate_from_subranges() with lambdas.

2 years agoMerge pull request #13095 from kuljitvirk/Branch_FixBug12916_SparseDirectUMFPACK
Jean-Paul Pelteret [Thu, 30 Dec 2021 16:13:02 +0000 (17:13 +0100)]
Merge pull request #13095 from kuljitvirk/Branch_FixBug12916_SparseDirectUMFPACK

Fixed bug in SparseDirectUMFPACK #12916

2 years agoMerge pull request #13079 from kronbichler/eval_no_check_orientations
Wolfgang Bangerth [Thu, 30 Dec 2021 16:05:38 +0000 (09:05 -0700)]
Merge pull request #13079 from kronbichler/eval_no_check_orientations

Evaluation kernels: Avoid checking the orientations in inner loop

2 years agoParallelize some functions setting up UMFPACK. 13155/head
Wolfgang Bangerth [Wed, 29 Dec 2021 19:21:33 +0000 (12:21 -0700)]
Parallelize some functions setting up UMFPACK.

2 years agoMerge pull request #13145 from jfriedlein/jfriedlein-4th_order_unit_tensor_docu_typo
Jean-Paul Pelteret [Thu, 30 Dec 2021 09:54:44 +0000 (10:54 +0100)]
Merge pull request #13145 from jfriedlein/jfriedlein-4th_order_unit_tensor_docu_typo

typo in docu of fourth order unit tensor (SymmetricTensor<4, dim, Number> identity_tensor())

2 years agoAdd a changelog entry 13154/head
Jean-Paul Pelteret [Thu, 30 Dec 2021 08:02:08 +0000 (09:02 +0100)]
Add a changelog entry

2 years agoAdd test coverage for BoundaryID and ManifoldID iterator filters
Jean-Paul Pelteret [Thu, 30 Dec 2021 07:57:08 +0000 (08:57 +0100)]
Add test coverage for BoundaryID and ManifoldID iterator filters

2 years agoAdd manifold ID iterator filter predicate
Jean-Paul Pelteret [Thu, 30 Dec 2021 06:56:21 +0000 (07:56 +0100)]
Add manifold ID iterator filter predicate

2 years agoAdd boundary ID iterator filter predicate
Jean-Paul Pelteret [Thu, 30 Dec 2021 06:55:48 +0000 (07:55 +0100)]
Add boundary ID iterator filter predicate

2 years agoMerge pull request #13102 from mwichro/patch-2
Daniel Arndt [Wed, 29 Dec 2021 20:56:11 +0000 (15:56 -0500)]
Merge pull request #13102 from mwichro/patch-2

2 years agofix indentation. 13102/head
Michał Wichrowski [Wed, 29 Dec 2021 19:38:48 +0000 (20:38 +0100)]
fix indentation.

Sorry everyone for the mess

2 years agoSimplify more code in parallel.h via lambda functions. 13153/head
Wolfgang Bangerth [Wed, 29 Dec 2021 19:21:14 +0000 (12:21 -0700)]
Simplify more code in parallel.h via lambda functions.

2 years agoMake code readable by using 'auto'. 13151/head
Wolfgang Bangerth [Wed, 29 Dec 2021 17:26:02 +0000 (10:26 -0700)]
Make code readable by using 'auto'.

2 years agoSimplify code by using lambda functions.
Wolfgang Bangerth [Wed, 29 Dec 2021 17:23:49 +0000 (10:23 -0700)]
Simplify code by using lambda functions.

2 years agoMerge pull request #13142 from bangerth/flatten-4
Daniel Arndt [Wed, 29 Dec 2021 15:49:27 +0000 (10:49 -0500)]
Merge pull request #13142 from bangerth/flatten-4

2 years agoBetter document the ConsensusAlgorithms::NPX class. 13082/head
Wolfgang Bangerth [Thu, 16 Dec 2021 00:05:36 +0000 (17:05 -0700)]
Better document the ConsensusAlgorithms::NPX class.

2 years agoTreat compute_n_point_to_point_communications() the same way. 13147/head
Wolfgang Bangerth [Wed, 29 Dec 2021 02:06:18 +0000 (19:06 -0700)]
Treat compute_n_point_to_point_communications() the same way.

2 years agoAdd a bit of documentation.
Wolfgang Bangerth [Wed, 29 Dec 2021 01:51:47 +0000 (18:51 -0700)]
Add a bit of documentation.

2 years agodocu of fourth order unit tensor: typo in index notation 13145/head
Johannes Friedlein [Tue, 28 Dec 2021 18:28:49 +0000 (19:28 +0100)]
docu of fourth order unit tensor: typo in index notation

corrected minor typo in documentation of fourth order unit tensor (or "fourth order identity tensor") \mathcal{I}_{ijkl}, compare for instance Wriggers "Nonlinear Finite Element Methods" p.79 eq. (3.270) or [Notes on Continuum Mechanics - Tensors](http://mmc.rmee.upc.edu/documents/Tensor_Analysis/tensors.pdf) eq. (1.175); appears to be a copy-paste error from previous line 101


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