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doc-src/Tutorial/ToyList/lemma3
author
wenzelm
Tue, 25 Jul 2000 00:02:52 +0200
changeset 9434
d2fa043ab24f
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
do nat pass theory value, but sg_ref;
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);