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sleeve chen

Just a nobody :(

An amateur pianist & composer who has an insatiable desire for math.

An investor.

Ravel Piano Concerto Mov.2 is one of the nicest music in my mind.

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  • Member for 7 years, 1 month
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  • Last seen May 5 at 11:54

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33 Difference between an isometric operator and a unitary operator on a Hilbert space Aug 16 '14
13 Diagonalizable vs full rank vs nonsingular (square matrix) Jun 4 '16
13 Hessian of log-sum-exp $f(z) = \operatorname{log} \sum_{i=1}^n z_i$, find $\nabla^2f(z)$ Jan 9 '17
12 Advanced stochastic process book (a bit flavor from real analysis) Dec 24 '15
12 Why the surface of the sphere is not a Euclidean space? Sep 16 '14
12 How to show square root of absolute of x, $\sqrt{|x|}$, is not Lipschitz continuous? Jul 27 '15
11 Orthogonal Projection of $ z $ onto the Affine set $ \left\{ x \mid A x = b \right\} $ Jun 10 '15
9 Can Nash Equilibrium be more than two? May 28 '14
9 Resolution of the identity (basic questions) Aug 2 '17
8 Why is semi-norm special and preferred? Aug 21 '14
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