doc-src/Tutorial/ToyList/lemma3
author nipkow
Fri, 18 May 2001 12:13:53 +0200
changeset 11307 891fbd3f4881
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);