doc-src/Tutorial/ToyList/lemma3
author kleing
Sun, 09 Dec 2001 14:37:42 +0100
changeset 12433 654acbf26fcc
parent 5377 efb799c5ed3c
permissions -rw-r--r--
HOLCF/IMP converted to Isar

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