fix schur preconditioner format

diff --git a/examples/step-32/step-32.cc b/examples/step-32/step-32.cc
index c47478cbfa31d135b89941407060b849b416ec33..5b1ab80eaa7a67e0e718b14a02c0bab6f208ea25 100644 (file)
--- a/examples/step-32/step-32.cc
+++ b/examples/step-32/step-32.cc
@@ -212,7 +212,7 @@ namespace Step32
   // from the one used in step-31. Specifically, it is a right preconditioner,
   // implementing the matrix
   // @f{align*}{
-  //   \left(\begin{array}{cc}A^{-1} & B^T
+  //   \left(\begin{array}{cc}A^{-1} & -A^{-1}B^TS^{-1}
   //                        \\0 & S^{-1}
   // \end{array}\right)
   // @f}