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doc-src/Tutorial/ToyList/lemma3
author
wenzelm
Wed, 20 Feb 2002 00:53:53 +0100
changeset 12902
a23dc0b7566f
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
Symbol.bump_string;
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);