Mathematics
Profile Activity
Meta user
Network profile
6,610
reputation
6
29
70

sleeve chen
top 5% overall

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.

6
answers
386
questions
~213k
people reached
  • Member for 6 years, 2 months
  • 1,041 profile views
  • Last seen 6 mins ago

Communities (14)

Top network posts

Top tags (228)

Score 4
Posts 48
Posts % 12
Score 4
Posts 27
Score 0
Posts 73
Score 0
Posts 48
Score 0
Posts 41
Score 0
Posts 27
View all tags →

Top posts (392)

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

Badges (105)

Gold

6

Rarest

Silver

29

Rarest

Bronze

70

Rarest

View all badges →