User daizhuo - MathOverflow

daizhuo

Member for 14 years, 5 months

daizhuo.info
Cambridge MA, USA

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For what values of $k$ is matrix $k A - B$ positive semidefinite?

Nov 29, 2010

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Expectation, multinomial distribution, and monotonicity (A conjecture)

Dec 1, 2010

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How to write Matlab's dot operators in mathematical expressions?

Jul 19, 2010

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How to characterize real square matrices A, such that v'Av >= 0, for all real vectors v with 1'v=0 (1 is the vector of all ones)?

Nov 4, 2010