doc-src/Tutorial/ToyList/lemma3
author nipkow
Wed, 11 Feb 2004 01:26:15 +0100
changeset 14381 1189a8212a12
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Modified UN and INT xsymbol syntax: made index subscript

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