Mon, 25 Jan 2010 20:35:42 +0100 Christian Urban re-inserted lemma in QuotList
Mon, 25 Jan 2010 19:52:53 +0100 Christian Urban added prs and rsp lemmas for Some and None
Mon, 25 Jan 2010 19:14:46 +0100 Christian Urban tuned proofs (mainly in QuotProd)
(0) -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 tip