doc-src/Tutorial/ToyList/lemma3
author schirmer
Wed, 29 Sep 2004 18:32:25 +0200
changeset 15215 6bd87812537c
parent 5377 efb799c5ed3c
permissions -rw-r--r--
tuned performance of record definition

Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);