doc-src/Tutorial/ToyList/lemma3
author wenzelm
Wed, 08 Aug 2001 14:16:42 +0200
changeset 11478 0f57375aafce
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);