Tue, 07 Jul 2009 00:29:34 +0200 wenzelm add_classrel/arity: strip_shyps of stored result;
Mon, 06 Jul 2009 22:42:27 +0200 wenzelm clarified strip_shyps: proper type witnesses for present sorts;
Mon, 06 Jul 2009 22:41:00 +0200 wenzelm witness_sorts: proper type witnesses for hyps, not invented "'hyp" variables;
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