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doc-src/Tutorial/ToyList/lemma3
author
wenzelm
Wed, 08 Aug 2001 17:39:32 +0200
changeset 11491
085a0d2857e8
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
added constify_ast_tr;
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);