doc-src/Tutorial/ToyList/lemma3
author nipkow
Thu, 12 Oct 2000 18:44:35 +0200
changeset 10213 01c2744a3786
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);