doc-src/Tutorial/ToyList/lemma3
author nipkow
Mon, 13 May 2002 15:27:28 +0200
changeset 13145 59bc43b51aa2
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);