From a0ea655b9eb5ee1d550ef8c338bda4f5f20a2a50 Mon Sep 17 00:00:00 2001 From: wolf Date: Tue, 3 Feb 2004 15:23:03 +0000 Subject: [PATCH] Minor changes. git-svn-id: https://svn.dealii.org/trunk@8389 0785d39b-7218-0410-832d-ea1e28bc413d --- .../chapter-2.step-by-step/step-16.data/intro.html | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/deal.II/doc/tutorial/chapter-2.step-by-step/step-16.data/intro.html b/deal.II/doc/tutorial/chapter-2.step-by-step/step-16.data/intro.html index 39d27081c8..51d1f29dec 100644 --- a/deal.II/doc/tutorial/chapter-2.step-by-step/step-16.data/intro.html +++ b/deal.II/doc/tutorial/chapter-2.step-by-step/step-16.data/intro.html @@ -3,9 +3,9 @@

This example shows the basic usage of the multilevel functions in -deal.II. It solves Helmholtz equation with Neumann boundary conditions +deal.II. It solves the Helmholtz equation with Neumann boundary conditions to avoid additional complications due to Dirichlet boundary conditions (there, -some library functionsare missing). In all other respects, it is similar to +some library functions are missing). In all other respects, it is similar to step 5.

@@ -16,14 +16,15 @@ have to be created before starting the multilevel method. These are
  • MGTransfer, the object handling transfer between grids
  • MGCoarse, the solver on the coarsest level
  • MGSmoother, the smoother on all other levels -
  • MGMatrix, the matrix object having a special level multipplication. +
  • MGMatrix, the matrix object having a special level multiplication, i.e. we +basically store one matrix per grid level and allow multiplication with it.

    These objects are combined in an object of type Multigrid, containing the implementation of the V-cycle, which is in turn used by the preconditioner -PreconditionMG, ready for plug-in into a linear slver of the LAC library. +PreconditionMG, ready for plug-in into a linear solver of the LAC library.

    -- 2.39.5