Sun, 31 Jan 2010 14:51:32 +0100 haftmann dropped some redundancies
Sun, 31 Jan 2010 14:51:31 +0100 haftmann generalized lemma foldl_apply_inv to foldl_apply
Sun, 31 Jan 2010 14:51:30 +0100 haftmann more correspondence lemmas between related operations; tuned some proofs
Thu, 28 Jan 2010 11:48:49 +0100 haftmann new theory Algebras.thy for generic algebraic structures
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