doc-src/Tutorial/ToyList/lemma1
author wenzelm
Thu, 01 Jul 1999 17:41:16 +0200
changeset 6872 b250da153b1e
parent 5377 efb799c5ed3c
permissions -rw-r--r--
fixed backtracking of global_qed;

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