changeset 10849 | de981d0037ed |
parent 10839 | 1f93f5a27de6 |
child 10983 | 59961d32b1ae |
--- a/doc-src/TutorialI/Sets/Functions.thy Wed Jan 10 11:12:45 2001 +0100 +++ b/doc-src/TutorialI/Sets/Functions.thy Wed Jan 10 11:13:11 2001 +0100 @@ -119,19 +119,17 @@ text{* illustrates Union as well as image *} + lemma "f`A \<union> g`A = (\<Union>x\<in>A. {f x, g x})" - apply (blast) - done +by blast lemma "f ` {(x,y). P x y} = {f(x,y) | x y. P x y}" - apply (blast) - done +by blast text{*actually a macro!*} lemma "range f = f`UNIV" - apply (blast) - done +by blast text{*