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doc-src/Tutorial/ToyList/lemma3
author
wenzelm
Tue, 12 Feb 2002 20:35:35 +0100
changeset 12882
e20f14f7ff35
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
eliminated Pure/Isar/comment.ML;
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);