From d29ab58bea950293c9a074152a46f54c228cecd3 Mon Sep 17 00:00:00 2001
From: David Wells <drwells@email.unc.edu>
Date: Mon, 22 Oct 2018 22:15:01 -0400
Subject: [PATCH] step-27: Lower the linear solver tolerance.

This makes the pictures symmetric.
---
 examples/step-27/step-27.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/step-27/step-27.cc b/examples/step-27/step-27.cc
index 6f9934284f..1f87b2e4fe 100644
--- a/examples/step-27/step-27.cc
+++ b/examples/step-27/step-27.cc
@@ -379,7 +379,7 @@ namespace Step27
   void LaplaceProblem<dim>::solve()
   {
     SolverControl solver_control(system_rhs.size(),
-                                 1e-8 * system_rhs.l2_norm());
+                                 1e-12 * system_rhs.l2_norm());
     SolverCG<>    cg(solver_control);
 
     PreconditionSSOR<> preconditioner;
-- 
2.39.5