changeset 4330 | a5a82aaf2d76 |
parent 4307 | 0727c8d8a359 |
child 4348 | c7f6b4256964 |
--- a/src/FOL/ex/cla.ML Mon Dec 01 08:59:40 1997 +0100 +++ b/src/FOL/ex/cla.ML Mon Dec 01 12:50:04 1997 +0100 @@ -423,7 +423,7 @@ goal FOL.thy "(EX z w. ALL x y. P(x,y) <-> (x=z & y=w)) --> \ \ (EX w. ALL y. EX z. (ALL x. P(x,y) <-> x=z) <-> y=w)"; -by (Blast_tac 1); +by (Fast_tac 1); (*nearly 10 times faster than Blast_tac*) result(); writeln"Problem 55";