From 9c75087d480ba49ddc5983bf58a53001990757d0 Mon Sep 17 00:00:00 2001 From: Wolfgang Bangerth Date: Thu, 30 Apr 1998 14:15:08 +0000 Subject: [PATCH] Doc update. git-svn-id: https://svn.dealii.org/trunk@229 0785d39b-7218-0410-832d-ea1e28bc413d --- deal.II/deal.II/include/numerics/error_estimator.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/deal.II/deal.II/include/numerics/error_estimator.h b/deal.II/deal.II/include/numerics/error_estimator.h index 42dbd01404..e4d31301d0 100644 --- a/deal.II/deal.II/include/numerics/error_estimator.h +++ b/deal.II/deal.II/include/numerics/error_estimator.h @@ -30,7 +30,10 @@ class dVector; of Ainsworth for a complete discussion. It seem as if this error estimator should only be valid for linear ansatz - spaces, but no definite answer is given to this question at present. + spaces, and there are indications that for higher order ansatz spaces the + integrals computed here show superconvergence properties, i.e. they tend + to zero faster than the error itself, thus ruling out the values as error + indicators. {\bf Implementation} @@ -74,6 +77,11 @@ class dVector; \item No other boundary conditions are considered. \end{itemize} + + The integration along faces with hanging nodes is quite tricky, since one + of the elements has to be shifted one level up or down. See the + documentation for the #FEFaceValues# class for more information about + technical issues regarding this topic. @author Wolfgang Bangerth, 1998; thanks to Franz-Theo Suttmeier for clarifications about boundary conditions. -- 2.39.5