From c8eb872321ede579f399221b9be5aa318b718cdb Mon Sep 17 00:00:00 2001 From: bangerth Date: Mon, 11 Sep 2006 16:02:50 +0000 Subject: [PATCH] Fix reference git-svn-id: https://svn.dealii.org/trunk@13895 0785d39b-7218-0410-832d-ea1e28bc413d --- deal.II/examples/step-23/doc/intro.dox | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/deal.II/examples/step-23/doc/intro.dox b/deal.II/examples/step-23/doc/intro.dox index 1fca1cf284..3e67f6594b 100644 --- a/deal.II/examples/step-23/doc/intro.dox +++ b/deal.II/examples/step-23/doc/intro.dox @@ -367,7 +367,11 @@ restriction. Implicit schemes do not have this restriction for stability, but they become inaccurate if the time step is too large. This condition was first recognized by Courant, Friedrichs, and Levy — -in 1943, long before computers become available for numerical computations! +in 1928, long before computers become available for numerical +computations! (This result appeared in R. Courant, K. Friedrichs and +H. Lewy: Über die partiellen Differenzengleichungen der +mathematischen Physik, Mathematische Annalen, vol. 100, no. 1, +pages 32-74, 1928.) Consequently, the condition on the time step is most frequently just referred to as the CFL condition. In the program, we will refine a square $[-1,1]$ seven times uniformly, giving a mesh size of $h=\frac 1{64}$, which -- 2.39.5