doc-src/Tutorial/ToyList/lemma3
author wenzelm
Thu, 15 Nov 2001 23:21:57 +0100
changeset 12216 dda8c04a8fb4
parent 5377 efb799c5ed3c
permissions -rw-r--r--
isatool unsymbolize;

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