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doc-src/Tutorial/ToyList/lemma3
author
paulson
Fri, 26 Sep 2003 10:34:57 +0200
changeset 14208
144f45277d5a
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
misc tidying
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);