*** empty log message ***
authornipkow
Fri, 17 May 2002 11:36:32 +0200
changeset 13158 8e86582a90d1
parent 13157 4a4599f78f18
child 13159 2af7b94892ce
*** empty log message ***
NEWS
--- a/NEWS	Fri May 17 11:25:07 2002 +0200
+++ b/NEWS	Fri May 17 11:36:32 2002 +0200
@@ -1,7 +1,13 @@
-
 Isabelle NEWS -- history user-relevant changes
 ==============================================
 
+*** HOL ***
+
+* arith(_tac) does now know about div 2 and mod 2 on type nat.
+  It can solve simple goals like "0 < n ==> n div 2 < (n::nat)"
+  but fails if divisibility plays a role like in
+  "n div 2 + (n+1) div 2 = (n::nat)".
+
 New in Isabelle2002 (March 2002)
 --------------------------------