diff -r 457abb82fb9e -r 9ede42599eeb src/HOL/Multivariate_Analysis/Linear_Algebra.thy
--- a/src/HOL/Multivariate_Analysis/Linear_Algebra.thy	Tue Jul 28 16:16:13 2015 +0100
+++ b/src/HOL/Multivariate_Analysis/Linear_Algebra.thy	Tue Jul 28 17:15:01 2015 +0100
@@ -1203,7 +1203,7 @@
     show ?lhs
       using i False
       apply (auto simp add: dependent_def)
-      by (metis in_span_insert insert_Diff insert_Diff_if insert_iff)
+      by (metis in_span_insert insert_Diff_if insert_Diff_single insert_absorb)
   qed
 qed