MathOverflow is a question and answer site for professional mathematicians. It only takes a minute to sign up.

Sign up to join this community
Anybody can ask a question
Anybody can answer
The best answers are voted up and rise to the top

Top Questions

0 votes
0 answers
13 views

Gluing faces of n-cube

6 votes
2 answers
436 views

On some finiteness properties for schemes

1 vote
0 answers
68 views

What is $H^*(\mathbb{CP}^{2^N-1}/\Sigma_n;\mathbb{Z})$ when $N=\binom{n}{2}$?

0 votes
0 answers
6 views

Criteria on $f$ such that $\begin{bmatrix} 1 & f(t)\\ 0 & 1 \end{bmatrix}\mathbb Z^2$ is equidistributed on the circle (periodic orbit)

0 votes
0 answers
25 views

Large-deviation inequalities for a class of simple random multivariate polynomial

10 votes
0 answers
75 views

Unitary group of a von Neumann algebra: is it a retract of $U(H)$?

-1 votes
1 answer
62 views

Strong law of large numbers for a sequence of random variables in different probability spaces

0 votes
2 answers
151 views

Bounded inverse to morphism of Banach algebras

4 votes
1 answer
466 views

A converse of the maximum modulus Theorem

0 votes
0 answers
34 views

Proj of Weil divisors and fibrations

11 votes
1 answer
318 views

Does forgetting colimits preserve colimits?

1 vote
1 answer
57 views

On Dirac/ Clifford matrices

1 vote
1 answer
39 views

A non-example of a graded Frobenius algebra

5 votes
1 answer
138 views

Does negative trichotomy hold for constructive ordinals?

1 vote
0 answers
21 views

Size of set of positive integers no sum of two distinct elements giving square

4 votes
0 answers
38 views

Sheaf of compact Hausdorff spaces but not a condensed anima

1 vote
0 answers
51 views

Approximating $L^p$ functions by eigenfunctions of Laplacian

150 votes
34 answers
13k views

Conceptual reason why the sign of a permutation is well-defined?

1 vote
1 answer
115 views

Relative $G$-equivariant homology groups

6 votes
1 answer
403 views

Combinatorial consequences of de Branges's Theorem?

0 votes
1 answer
59 views

Yates-Grundy draw-by-draw sampling inclusion probabilities

6 votes
1 answer
351 views
+500

Are topological PID's Noetherian?

9 votes
2 answers
307 views

Why study finite topological spaces?

6 votes
2 answers
528 views

Cofinality of Theta if sharps exist

2 votes
0 answers
46 views

A possible generalization of the Frobenius theorem

3 votes
1 answer
193 views

Pointwise convergence and disjoint sequences in $C(K)$

1 vote
0 answers
15 views

Finite (schema) axiomatizability of representable cylindric algebras

4 votes
1 answer
215 views

Fiber-bundle : continuity of transition maps and inverse in general

0 votes
1 answer
29 views

Does a symmetric monoidal functor between cartesian monoidal categories automatically preserve products?

1 vote
0 answers
12 views

Can a holomorphic disk in the closure of a pseudoconvex domain be partially contained in the boundary?

0 votes
0 answers
36 views

Positivity of the Fourier transform: prove or disprove that $\operatorname{Re}(\overline{\widehat{u}}(\xi) \widehat{F\circ u}(\xi))\geq0$

1 vote
0 answers
86 views

Is this class of $p$-groups large?

-1 votes
0 answers
39 views

Checking for an inscribed square within a Jordan curve

0 votes
0 answers
29 views

Markov process with time varying transition kernels

5 votes
0 answers
89 views

Does the inner automorphism group of the fundamental group of a closed aspherical manifold always have an element of infinite order?

1 vote
0 answers
58 views

Not a twin prime pair test using $\gcd$ only

2 votes
0 answers
129 views

What are the Tits algebras of $\mathrm{SO}(A, \sigma)$ if $A$ is split?

0 votes
0 answers
10 views

set connectedness with two equivalent definition. how to prove they are equal? [migrated]

2 votes
0 answers
26 views

Klyachko-type inequalities for shifted Schur structure constants

0 votes
0 answers
18 views

A question about almost realcompactification

1 vote
1 answer
39 views

Orbit closure of two elliptic Möbius transformations

47 votes
2 answers
2k views

Can the sphere be partitioned into small congruent cells?

1 vote
1 answer
60 views

Question on ideal triangulation and geodesic lamination

1 vote
0 answers
42 views

Extension theorem for Hölder space on a open set in a general manifold

5 votes
1 answer
186 views

Extending Hölder functions


Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.