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Dec 18, 2011 at 11:37 vote accept MZWang
Dec 17, 2011 at 13:03 answer added S. Carnahan timeline score: 2
Dec 16, 2011 at 9:11 comment added Angelo This is completely false when neither of them is compact. In the case when one of them is compact, you can use the projection formula.
Dec 16, 2011 at 6:09 history edited MZWang CC BY-SA 3.0
added 270 characters in body; edited title
Dec 15, 2011 at 6:37 comment added David Roberts Please make the title of your question an english sentence, and also check out mathoverflow.net/howtoask
Dec 15, 2011 at 6:00 history asked MZWang CC BY-SA 3.0