doc-src/Tutorial/ToyList/lemma3
author wenzelm
Sun, 31 Oct 1999 20:11:23 +0100
changeset 7990 0a604b2fc2b1
parent 5377 efb799c5ed3c
permissions -rw-r--r--
updated;

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