doc-src/Tutorial/ToyList/lemma3
author wenzelm
Thu, 08 Aug 2002 23:51:24 +0200
changeset 13486 54464ea94d6f
parent 5377 efb799c5ed3c
permissions -rw-r--r--
exception SIMPROC_FAIL: solid error reporting of simprocs;

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