src/ZF/ex/Primes.ML
changeset 2034 5079fdf938dd
parent 1793 09fff2f0d727
child 2469 b50b8c0eec01
--- a/src/ZF/ex/Primes.ML	Thu Sep 26 15:14:23 1996 +0200
+++ b/src/ZF/ex/Primes.ML	Thu Sep 26 15:49:54 1996 +0200
@@ -51,7 +51,7 @@
 (* GCD by Euclid's Algorithm *)
 
 goalw thy [egcd_def] "!!m. m:nat ==> egcd(m,0) = m";
-by (rtac (transrec RS ssubst) 1);
+by (stac transrec 1);
 by (asm_simp_tac ZF_ss 1);
 qed "egcd_0";