doc-src/Tutorial/ToyList/lemma3
author nipkow
Thu, 25 Jan 2001 15:31:31 +0100
changeset 10978 5eebea8f359f
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);