204 reputation
14
bio website
location
age
visits member for 11 months
seen Jul 31 '13 at 5:17

Professional mathematician and scientist


Jun
21
comment Find all functions that are analytic on the closed disk and that satisfy
Sorry, one should apply my argument to $f^2(z)/z$, which is bounded and entire, and therefore, constant by Liouville's or Picard's theorem. Then, since $f(z)$ has no branch cut, the constant must be $0$.
Jun
21
comment Find all functions that are analytic on the closed disk and that satisfy
Well, one can apply it to the function $f(z)/\sqrt(z)$, which is bounded and entire. The singularity at $0$ is removable...
Jun
1
revised geometric multiplicity= algebraic multiplicity for a symmetric matrix
fixed grammar...
Jun
1
comment Eigenvalues of a tridiagonal trigonometric matrix
The answer to this question may be helpful: math.stackexchange.com/questions/392908/…
Jun
1
comment Eigenvalues of a tridiagonal trigonometric matrix
Do you have intuition on why the rest of the coefficients of the polynomials are equal?
May
31
comment My son's Sum of Some is beautiful! But what is the proof or explanation?
You may like the somewhat similar pattern in the following question: math.stackexchange.com/questions/390266/…
May
28
comment Solving equations involving modulo operator
Answers to this question may be useful: math.stackexchange.com/questions/389063/…
May
28
comment On integral of a function over a simplex
There are $n^2$ order parameters/unknowns in the problem. The translation and rotation invariance decreases their number only by order $n^2/2$. So, the problem is still complicated in nD... –
May
27
revised Eigenvalues of a tridiagonal trigonometric matrix
added 184 characters in body
May
24
revised Eigenvalues of a tridiagonal trigonometric matrix
added 6 characters in body; edited tags; edited title
May
23
revised Eigenvalues of a tridiagonal trigonometric matrix
corrected angles and grammar
May
23
asked Eigenvalues of a tridiagonal trigonometric matrix
May
22
comment Eigenvectors basis and orthonormal basis for of linear transformation $T$
You suspicion is right. Also, $T$ is represented by symmetric matrix in the standard basis...
May
22
comment On integral of a function over a simplex
But what about 3D or nD?..
May
20
awarded  Benefactor
May
20
accepted A matrix w/integer eigenvalues and trigonometric identity
May
20
comment A matrix w/integer eigenvalues and trigonometric identity
Observation 1: There is only a statement but no proof at the link. Observation 2: Does it follow from the fact that $\Lambda$ is symmetric?
May
20
comment A matrix w/integer eigenvalues and trigonometric identity
@J.M. No, I have not, thank you it's very relevant...
May
20
comment On integral of a function over a simplex
Well the idea is that the weights in the integral/sum formula do not depend on particular linear function, but only on geometry of the simplex...
May
19
awarded  Nice Question