
diff -r f30b73385060 -r 25b068a99d2b src/HOL/Matrix/MatrixGeneral.thy
--- a/src/HOL/Matrix/MatrixGeneral.thy	Wed Jul 26 13:31:07 2006 +0200
+++ b/src/HOL/Matrix/MatrixGeneral.thy	Wed Jul 26 19:23:04 2006 +0200
@@ -994,8 +994,6 @@
   apply (subst foldseq_almostzero[of _ j])
   apply (simp add: prems)+
   apply (auto)
-  apply (insert ncols_le[of A j])
-  apply (arith)
   proof -
     fix k
     fix l




