| Wed, 10 Feb 2010 14:12:04 +0100 | haftmann | moved less_eq, less to Orderings.thy; moved abs, sgn to Groups.thy | file | diff | annotate |
| Thu, 28 Jan 2010 11:48:49 +0100 | haftmann | new theory Algebras.thy for generic algebraic structures | file | diff | annotate |