12,319 reputation
21352
bio website
location
age
visits member for 2 years, 8 months
seen 1 hour ago

11h
awarded  Favorite Question
2d
comment Tensor product of two linear map and its matrix representation
where I can get a nice proof?
2d
asked Tensor product of two linear map and its matrix representation
2d
accepted dimension of the space of all symmetric matrices with trace $0$ and $a_{11}=0$,
Oct
16
comment why and how these two maps are equal, and how they find the norm?
could you please tell me the answer of this question? math.stackexchange.com/questions/976923/…
Oct
16
comment why and how these two maps are equal, and how they find the norm?
thanks a lot, yes yes, I have proved the fact $\|A\|^2=\|A^*A\|$
Oct
16
comment why and how these two maps are equal, and how they find the norm?
Thank you very much, I have understood your explanation, but how the norm inequality at the end came?could you help that to understand?
Oct
14
comment Eigen values of a positive semidefinite matrix and its transpose
thanks :)...........
Oct
14
accepted Eigen values of a positive semidefinite matrix and its transpose
Oct
14
asked Eigen values of a positive semidefinite matrix and its transpose
Oct
13
awarded  Popular Question
Oct
13
awarded  Popular Question
Oct
13
revised $\|a\|\le 1\Leftrightarrow -I\le a\le I$, where $a$ is a hermitian matrix
added 7 characters in body
Oct
13
revised $\|a\|\le 1\Leftrightarrow -I\le a\le I$, where $a$ is a hermitian matrix
added 8 characters in body
Oct
13
asked $\|a\|\le 1\Leftrightarrow -I\le a\le I$, where $a$ is a hermitian matrix
Oct
12
comment $A$ is hermitian iff $A=M-N$ for some $M,N$ positive semidefinite matrix?
@VedranŠego Thanks, Gitgud, Thanks
Oct
12
accepted $A$ is hermitian iff $A=M-N$ for some $M,N$ positive semidefinite matrix?
Oct
12
asked $A$ is hermitian iff $A=M-N$ for some $M,N$ positive semidefinite matrix?
Oct
10
comment $\|T^*T\|=\max\{\lambda: \lambda \text{ is an eigen value of } T^*T\}$
what is $\arg\max\lambda_i^2$?
Oct
10
accepted $\|T^*T\|=\max\{\lambda: \lambda \text{ is an eigen value of } T^*T\}$