doc-src/Tutorial/ToyList/lemma3
author wenzelm
Fri, 11 Jan 2002 00:28:24 +0100
changeset 12708 31672377dadc
parent 5377 efb799c5ed3c
permissions -rw-r--r--
clarified IsarThy.apply_theorems_i;

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