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src/HOL/Matrix/MatrixGeneral.thy
changeset 20217 25b068a99d2b
parent 16933 91ded127f5f7
child 20283 81b7832b29a3 
--- 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
isabelle