doc-src/Tutorial/ToyList/lemma3
author wenzelm
Sun, 03 Oct 1999 15:51:38 +0200
changeset 7682 46de8064c93c
parent 5377 efb799c5ed3c
permissions -rw-r--r--
added Space, Comment token kinds (keep actual text); source: do not filter proper;

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