425 reputation
211
bio website
location Beijing, China
age 21
visits member for 2 years, 5 months
seen Oct 9 '13 at 10:18

I'm a student in the School of Mathematical Sciences of Peking University, China.

I'm interested in classical music and, of course, math problems~


Jul
26
awarded  Nice Question
Jul
2
awarded  Curious
Jun
13
awarded  Popular Question
Apr
22
awarded  Yearling
Mar
24
awarded  Popular Question
Apr
22
awarded  Yearling
Jan
9
comment How to interpret the power of $\pi$ in the expression of the volume of an n-dimensional ball?
@Marek Thank you very very much! I'm really interested in your comment, also looking forward to a more detailed answer:)
Jan
6
asked How to interpret the power of $\pi$ in the expression of the volume of an n-dimensional ball?
Sep
23
accepted In a ring $aba=0$ implies $ab=0$ or $ba=0$?
Sep
22
asked In a ring $aba=0$ implies $ab=0$ or $ba=0$?
Sep
22
accepted Any concrete example of ''right identity and left inverse do not imply a group''?
Sep
21
awarded  Custodian
Sep
11
revised Any concrete example of ''right identity and left inverse do not imply a group''?
deleted 33 characters in body
Sep
11
reviewed Approve suggested edit on Any concrete example of ''right identity and left inverse do not imply a group''?
Sep
11
asked Any concrete example of ''right identity and left inverse do not imply a group''?
Jul
15
asked A permutation in $S_n$ is 'regular' if and only if it is a power of an n-cycle?
Jun
15
accepted How to calculate transition matrix to get Jordan form?
May
24
awarded  Commentator
May
24
comment Any intuitive examples of symplectic vector space?
Not exactly, could you explain it? Thanks~
May
24
asked Any intuitive examples of symplectic vector space?