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how to find the normal cone of unit ball? plz help me.

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1 
 mathoverflow.net/faq#whatnot – Martin Brandenburg Nov 21 2011 at 14:21
Possibly this cone might be found at some other website (please see the faq). – S. Sra Nov 21 2011 at 14:22
You will need to add more context for the question to be meaningful. – S. Carnahan♦ Nov 21 2011 at 15:57

closed as too localized by Martin Brandenburg, S. Sra, Igor Rivin, Denis Serre, S. Carnahan♦ Nov 21 2011 at 15:56

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