http://www.mathhelpforum.com/math-he...1&d=1211440962

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- May 22nd 2008, 12:22 AMszpengchaoconvexity problem
- May 22nd 2008, 12:44 AMIsomorphism
- May 22nd 2008, 12:49 AMMoo
Hello,

An insignificant report...

Quote:

- May 22nd 2008, 12:53 AMIsomorphism
- May 22nd 2008, 12:56 AMMoo
- May 23rd 2008, 05:19 AMszpengchaoany other way
any other way of doing this by convex function's property?

and i hav a question, is there any property of convexity in R^n ?

f''(x)>=0 gives global definition in R

but this fails in R^n, why???