Tue, 30 Nov 2010 17:19:11 +0100 haftmann adaptions to changes in Equiv_Relation.thy
Tue, 30 Nov 2010 15:58:21 +0100 haftmann merged
Tue, 30 Nov 2010 15:58:09 +0100 haftmann more systematic and compact proofs on type relation operators using natural deduction rules
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