src/HOL/Groups_List.thy
Thu, 18 Sep 2014 15:07:43 +0200 haftmann product over monoids for lists
Thu, 11 Sep 2014 23:12:32 +0200 haftmann abstract product over monoid for lists
Wed, 03 Sep 2014 00:06:24 +0200 blanchet use 'datatype_new' in 'Main'
Sun, 31 Aug 2014 09:10:42 +0200 haftmann separated listsum material
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