Wed, 17 Jun 2015 17:21:11 +0200 nipkow renamed Multiset.set_of to the canonical set_mset
Wed, 17 Jun 2015 15:15:52 +0100 paulson correccted the pretty-printing specs for setsum and setprod
Wed, 17 Jun 2015 14:35:50 +0100 paulson New WF theorem by Tjark Weber. Replaced the proof of the subsequent theorem.
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