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I'm in the math PhD program at UCLA, focusing on convex optimization.


2d
comment What is the difference between the limit of a sequence and a limit point of a set?
A set can have many limit points, whereas a convergent sequence has only one limit.
Dec
10
awarded  Favorite Question
Dec
8
awarded  Caucus
Dec
8
comment Matrix norm induced by a vector norm.
Note that $\|A\|_1$ is the maximum absolute column sum of the matrix $A$.
Dec
7
comment Searching solution for solving huge linear system in MATLAB or C
How sparse is your matrix? How many nonzero entries? Is it symmetric positive definite? What method are you using to solve the linear system?
Dec
7
comment What are some textbooks on the same level as Ross's “A First Course in Probability”?
Introduction to Probability by Bertsekas.
Dec
6
answered Why does the sum of the reciprocals of factorials converge to $e$?
Dec
5
comment Does anyone know about Ramanujan's method of solving the quartic?
The help center mentions "History and development of mathematics" as being on-topic for math.stackexchange. Also, here are some similar questions which were highly upvoted. I think this question is on-topic here.
Dec
5
answered Matlab help to construct matrices with specified rank and such that each eigenvalue is real
Dec
4
comment Matlab help to construct matrices with specified rank and such that each eigenvalue is real
Hmm, one option would be to use the Matlab function rand to randomly generate the positive numbers $\lambda_1,\ldots, \lambda_r$.
Dec
4
comment Matlab help to construct matrices with specified rank and such that each eigenvalue is real
You can construct a random orthogonal matrix by randomly generating a matrix $M$ (using Matlab's randn function, for example), then computing the QR factorization of $M$ (using Matlab's qr function).
Dec
1
answered Differentiating a vector valued function
Dec
1
comment “Honest” introductory real analysis book
@paulgarrett Could you please elaborate on that a bit?
Nov
30
comment Does a Möbius strip have only one shape? Or may it have different shapes?
The book only described one particular Mobius strip. There are many others.
Nov
30
comment How to organize myself around calculus?
I wrote a summary of some of the key intuition (not rigor) behind calculus. Feel free to contact me if you have any questions or suggestions.
Nov
29
revised Quadratic Program reformulation
added 59 characters in body
Nov
29
comment Quadratic Program reformulation
@mtiano Ok, I just gave some more details about that.
Nov
29
revised Quadratic Program reformulation
added 467 characters in body
Nov
29
revised Quadratic Program reformulation
added 80 characters in body
Nov
29
answered Quadratic Program reformulation