changeset 6068 | 2d8f3e1f1151 |
parent 5325 | f7a5e06adea1 |
child 6288 | 694c9c1910e8 |
--- a/src/ZF/equalities.ML Wed Jan 06 15:00:12 1999 +0100 +++ b/src/ZF/equalities.ML Thu Jan 07 10:56:05 1999 +0100 @@ -602,7 +602,8 @@ by (Blast_tac 1); qed "Collect_Diff"; -Goal "{x:cons(a,B). P(x)} = if(P(a), cons(a, {x:B. P(x)}), {x:B. P(x)})"; +Goal "{x:cons(a,B). P(x)} = \ +\ (if P(a) then cons(a, {x:B. P(x)}) else {x:B. P(x)})"; by (simp_tac (simpset() addsplits [split_if]) 1); by (Blast_tac 1); qed "Collect_cons";