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src/HOL/Hyperreal/Poly.thy
changeset 20432 07ec57376051
parent 20256 5024ba0831a6
child 20792 add17d26151b 
--- a/src/HOL/Hyperreal/Poly.thy	Tue Aug 29 21:43:34 2006 +0200
+++ b/src/HOL/Hyperreal/Poly.thy	Wed Aug 30 03:19:08 2006 +0200
@@ -426,6 +426,7 @@
      "\<forall>p2. length (p1 +++ p2) =
              (if (length p1 < length p2) then length p2 else length p1)"
 apply (induct "p1", simp_all)
+apply arith
 done
 
 lemma poly_root_mult_length: "length([a,b] *** p) = Suc (length p)"
isabelle