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doc-src/Tutorial/ToyList/lemma3
author
paulson
Fri, 13 Jul 2001 18:20:26 +0200
changeset 11422
a3487304489a
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
fixed bad error in tdxbold; also removed default indexing in \\rulename
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);