doc-src/Tutorial/ToyList/lemma3
author wenzelm
Sat, 29 May 2004 15:11:06 +0200
changeset 14844 a15c65e66ee9
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Scan.this; tuned;

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