doc-src/Tutorial/ToyList/lemma3
author wenzelm
Mon, 04 Oct 1999 21:45:10 +0200
changeset 7703 6b3424e877bd
parent 5377 efb799c5ed3c
permissions -rw-r--r--
proper dependencies of all theories and packages;

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