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Mathew's user avatar
Mathew's user avatar
Mathew
  • Member for 7 years, 10 months
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13 votes
1 answer
5k views

what is the advantage of LU factorization

9 votes
1 answer
308 views

Which operators commute with curl?

8 votes
2 answers
196 views

Is the following a group for all topologies?

8 votes
2 answers
421 views

If two zero sets are homeomorphic, is the ring of polynomials over the sets also homeomorphic?

7 votes
1 answer
91 views

For which topological spaces $X$ is $X^n$ homeomorphic to the space of unordered n tuples of points in $X$

6 votes
1 answer
344 views

real valued functions that are invariant under convolution

6 votes
2 answers
495 views

Prove that $\lim\limits_{k\to\infty}\left(\frac1k\sum\limits_{n=1}^k\left\lfloor\frac kn\right\rfloor-\ln k\right)=2\gamma-1$

5 votes
1 answer
1k views

a way to represent algebraic numbers in a computer

5 votes
1 answer
425 views

A function with cubic variation

5 votes
1 answer
96 views

For which $n$ is the symmetric group $S_n$ a subgroup of the special orthogonal group $SO(3)$?

4 votes
1 answer
113 views

Is there a name for this type of topology?

4 votes
1 answer
148 views

finding a solution to a matrix inequality

4 votes
2 answers
239 views

Does every real skew symmetric matrix map some non-zero vector with non-negative entries into a vector with non-negative entries?

4 votes
1 answer
51 views

anti symmetric matrix with generalized eigenspace not equal to the eigenspace

4 votes
4 answers
153 views

When does every compact $A$ in a topology satisfy $A⊆B⊆C$ for some open $B$ and compact $C$?

4 votes
3 answers
281 views

Are all multivariate functions on finite fields equivalent to a unique polynomial of smallest degree?

4 votes
3 answers
2k views

Do covariant derivatives commute?

3 votes
1 answer
56 views

Finding a subset of fixed size of a graphs vertex set that minimizes 'surface area'. AKA finding min cut for fixed partition size.

3 votes
1 answer
125 views

a notion of dual for ideals

3 votes
1 answer
333 views

differences between convex functions

3 votes
2 answers
2k views

Solve $AX^2 + BX + C = 0$ [duplicate]

3 votes
1 answer
395 views

Does there exist a prime p for each natural n such that all polynomials in Zp of nth degree or less with coefficients in [-n,n]∩Z split?

3 votes
1 answer
163 views

rational function with area e under it

3 votes
0 answers
43 views

Are there any first order linear maps from vector valued functions to vector valued functions other than curl?

3 votes
0 answers
129 views

Classification of collinearity preserving maps from an open subset of $\mathbb{R}^n$ to $\mathbb{R}^m$

3 votes
0 answers
143 views

Do these generalization of riemannian/semi-riemannian geometry have names?

2 votes
1 answer
73 views

Solutions to the PDE $u_t=i u_x$ st. $\int |u|^2 dx < \infty$ and $\frac{d}{dt} \int |u|^2 dx = 0$

2 votes
2 answers
167 views

Minimizing the number of non zero columns of a linear subspace of matrices

2 votes
0 answers
65 views

Symmetric and dense distribution of points on the unit n-sphere

2 votes
1 answer
600 views

Analog to the identity theorem for holomorphic functions for functions of two complex variables