doc-src/Tutorial/ToyList/lemma3
author nipkow
Wed, 11 Feb 2004 00:37:18 +0100
changeset 14380 04b603a6f17d
parent 5377 efb799c5ed3c
permissions -rw-r--r--
*** empty log message ***

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