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doc-src/Tutorial/ToyList/lemma1
author
wenzelm
Sun, 16 Jul 2000 20:49:56 +0200
changeset 9355
1b2cd40579c6
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
avoid 'split';
Goal "rev(xs @ ys) = (rev ys) @ (rev xs)";