doc-src/Tutorial/ToyList/lemma1
author wenzelm
Mon, 16 Aug 1999 22:07:12 +0200
changeset 7224 e41e64476f9b
parent 5377 efb799c5ed3c
permissions -rw-r--r--
'a list: Nil, Cons;

Goal "rev(xs @ ys) = (rev ys) @ (rev xs)";