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doc-src/Tutorial/ToyList/lemma3
author
berghofe
Fri, 31 Aug 2001 16:17:52 +0200
changeset 11523
9a658fe20107
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
Tuned function extend_lexicon.
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);