doc-src/Tutorial/ToyList/lemma3
author nipkow
Wed, 29 Mar 2000 14:23:27 +0200
changeset 8603 805910de7be0
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);