Doc update.

git-svn-id: https://svn.dealii.org/trunk@8894 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/lac/include/lac/sparse_matrix.h b/deal.II/lac/include/lac/sparse_matrix.h
index 7b0c4ffb90b767c85babe94d346831ab9dfba03c..e77a1e21238c0a45ef85cae03c047e7978d08e7b 100644 (file)
--- a/deal.II/lac/include/lac/sparse_matrix.h
+++ b/deal.II/lac/include/lac/sparse_matrix.h
@@ -311,6 +311,10 @@ namespace internals
                                           * the row numbers are
                                           * equal and the first
                                           * index is smaller.
+                                          *
+                                          * This function is only valid if
+                                          * both iterators point into the same
+                                          * matrix.
                                           */
        bool operator < (const Iterator&) const;