Thu, 12 Apr 2012 19:58:59 +0200 backported Set_Algebras to use type classes (basically reverting b3e8d5ec721d from 2008)
krauss [Thu, 12 Apr 2012 19:58:59 +0200] rev 47443
backported Set_Algebras to use type classes (basically reverting b3e8d5ec721d from 2008)
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