Thu, 25 Aug 2011 12:43:55 -0700 rename subset_{interior,closure} to {interior,closure}_mono;
huffman [Thu, 25 Aug 2011 12:43:55 -0700] rev 44522
rename subset_{interior,closure} to {interior,closure}_mono; remove some legacy theorem names;
Thu, 25 Aug 2011 11:57:42 -0700 simplify many proofs about subspace and span;
huffman [Thu, 25 Aug 2011 11:57:42 -0700] rev 44521
simplify many proofs about subspace and span; reorder premises in rule span_induct;
Thu, 25 Aug 2011 11:56:20 -0700 remove duplicate simp declaration
huffman [Thu, 25 Aug 2011 11:56:20 -0700] rev 44520
remove duplicate simp declaration
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