Fri, 01 Jun 2007 15:14:05 +0200 Added "merge-lemma" about wellfoundedness of unions (useful for some termination proofs)
krauss [Fri, 01 Jun 2007 15:14:05 +0200] rev 23186
Added "merge-lemma" about wellfoundedness of unions (useful for some termination proofs)
Fri, 01 Jun 2007 15:12:56 +0200 Added simp-rules: "R O {} = {}" and "{} O R = {}"
krauss [Fri, 01 Jun 2007 15:12:56 +0200] rev 23185
Added simp-rules: "R O {} = {}" and "{} O R = {}"
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