From 89835b3fc4c0aa8ca560f5fdaf4c57a2d030b846 Mon Sep 17 00:00:00 2001 From: bangerth Date: Tue, 5 Feb 2013 15:45:05 +0000 Subject: [PATCH] Make clear that f=1. git-svn-id: https://svn.dealii.org/trunk@28231 0785d39b-7218-0410-832d-ea1e28bc413d --- deal.II/examples/step-3/doc/intro.dox | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/deal.II/examples/step-3/doc/intro.dox b/deal.II/examples/step-3/doc/intro.dox index bebeefdd28..ad3f4abe64 100644 --- a/deal.II/examples/step-3/doc/intro.dox +++ b/deal.II/examples/step-3/doc/intro.dox @@ -9,12 +9,15 @@ something. We will solve a simple version of Poisson's equation with zero boundary values, but a nonzero right hand side: @f{align*} - -\Delta u &= 1 \qquad\qquad & \text{in}\ \Omega, + -\Delta u &= f \qquad\qquad & \text{in}\ \Omega, \\ u &= 0 \qquad\qquad & \text{on}\ \partial\Omega. @f} We will solve this equation on the unit square, $\Omega=[0,1]^2$, for which -you've already learned how to generate a mesh in step-1 and step-2. +you've already learned how to generate a mesh in step-1 and step-2. In +this program, we will also only consider the particular case +$f(\mathbf x)=1$ and come back to how to implement the more general +case in the next tutorial program, step-4. If you've learned about the basics of the finite element method, you will remember the steps we need to take to approximate the solution $u$ by a finite -- 2.39.5