doc-src/Tutorial/ToyList/lemma3
author wenzelm
Wed, 03 Feb 1999 17:29:48 +0100
changeset 6211 43d0efafa025
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Theory loader database: theory and file dependencies, theory values and user data.

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