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doc-src/Tutorial/ToyList/lemma3
author
paulson
Mon, 02 Feb 2004 12:23:46 +0100
changeset 14371
c78c7da09519
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
Conversion of HyperNat to Isar format and its declaration as a semiring
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);