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doc-src/Tutorial/ToyList/lemma3
author
paulson
Tue, 01 Sep 1998 15:05:36 +0200
changeset 5418
a895ab904b85
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
Replaced Suc_diff_n by Suc_diff_le
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);