435 reputation
212
bio website wamath.sinaapp.com
location china
age 27
visits member for 3 years, 1 month
seen Dec 8 at 22:57

I am a postgraduate student in Southwest University, Chongqing, China, majored in elementary mathematics and interested fields include Riemannian Geometry and Elliptic Differential Equation. I always confused about the textbooks, so I would like have a discussion with anybody on the net.


Dec
8
comment Prove that holomorphic function does not have zeros
Can the maximum module principle help?
Dec
8
comment How to (dis)prove the following about harmonic functions
What's mean harmonic conjugate?
Dec
6
revised Show that $B$ must equal $0$ if $A$ and $C$ have no common Eigenvalues
it should be BVEig(C)=0, other than not equal...
Dec
5
awarded  Yearling
Dec
5
comment Geometric interpretation of Cauchy-Goursat Theorem?
what kind of geometric interpretation are you expect?
Dec
5
revised Show that $B$ must equal $0$ if $A$ and $C$ have no common Eigenvalues
added 522 characters in body
Dec
5
answered Show that $B$ must equal $0$ if $A$ and $C$ have no common Eigenvalues
Dec
5
answered Show that $B$ must equal $0$ if $A$ and $C$ have no common Eigenvalues
Dec
5
comment Prove $\forall a,b \in \mathbb{Z}, 18a + 6b \ne 1$
quite easy, since the rhs is dirisible by 3,but the lhs is not.
Oct
18
comment Existence of normal orthogonal frame on sphere such that it is normal at every point in a neighbourhood?
I mean orthogonal but not normal ftame and the relation can be allowed with a comformal factor?
Oct
18
comment Existence of normal orthogonal frame on sphere such that it is normal at every point in a neighbourhood?
yeah, after a while, I also kown that. But since the sphere is comformally flat, maybe I can expect this can be improved to be a more valuable answer?
Oct
18
revised Existence of normal orthogonal frame on sphere such that it is normal at every point in a neighbourhood?
Change the coordinates into frame
Oct
18
comment Existence of normal orthogonal frame on sphere such that it is normal at every point in a neighbourhood?
I think I'd better replace the coordinates by frame.
Oct
18
comment Existence of normal orthogonal frame on sphere such that it is normal at every point in a neighbourhood?
It should be note that the second equation just means the local frame is just parallel on $R^n$, and I don't know how to proof that in this case it will impliy that $S^{n-1}$ is flat. So maybe your can explain it in the answer.
Oct
17
revised Existence of normal orthogonal frame on sphere such that it is normal at every point in a neighbourhood?
edited title
Oct
17
asked Existence of normal orthogonal frame on sphere such that it is normal at every point in a neighbourhood?
Jul
8
comment Monotonically approximate $L^p$ function by step function
That's it! I just forgot what I have learned in my mind.
Jul
8
accepted Monotonically approximate $L^p$ function by step function
Jul
8
comment Monotonically approximate $L^p$ function by step function
By the way, Can you give some exactly reference or raise an answer here, of your second TRUE? I believe it will be useful to me, although the step function is replaced by simple function.
Jul
8
comment Monotonically approximate $L^p$ function by step function
@PhoemueX The step function usually means simple function on Cubes( intervals in $R^1$ case).