rhenskyyy

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385 reputation
17
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location Beijing, China
age 20
visits member for 1 year, 1 month
seen Jan 23 at 12:04
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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~


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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?
May
17
 accepted A finite-dimensional vector space cannot be covered by finitely many proper subspaces?
May
16
 comment A finite-dimensional vector space cannot be covered by finitely many proper subspaces?
@anon Could you give me some examples about finite fields and vector spaces over them? Thanks a lot~~
May
16
 revised A finite-dimensional vector space cannot be covered by finitely many proper subspaces?
added 135 characters in body
May
16
 comment A finite-dimensional vector space cannot be covered by finitely many proper subspaces?
@JimConant My textbook always assume the base field to be a number field. Could you tell me why this is possible for finite fields? Forgive me that I haven't learn abstract algebra and I cannot imagine a field that is not a number field...
May
16
 asked A finite-dimensional vector space cannot be covered by finitely many proper subspaces?
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