doc-src/Tutorial/ToyList/lemma3
author wenzelm
Sun, 13 Jan 2002 19:45:17 +0100
changeset 12734 c5f6d8259ecd
parent 5377 efb799c5ed3c
permissions -rw-r--r--
HOL-Real/Complex_Numbers;

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