Hottest Questions This Week

21 votes

5 answers

2k views

What phenomena are better modelled by SDE instead of ODE?

Rodrigo de Azevedo

2,256

answered Dec 19 at 18:07

23 votes

1 answer

1k views

Is every real number in [0,1] a product of three (or more) Cantor set's numbers?

John Bentin

2,427

modified 14 hours ago

12 votes

2 answers

578 views

The mysterious significance of local subgroups in finite group theory

Geoff Robinson

41.8k

modified 11 hours ago

6 votes

1 answer

508 views

do all two manifolds admit a three-colorable triangulation?

David E Speyer

150k

answered 2 days ago

17 votes

1 answer

989 views

Is this an instance of the snake lemma?

John Rognes

8,547

modified yesterday

4 votes

2 answers

537 views

Computing hypergeometric function at 1

Hjalmar Rosengren

1,514

modified Dec 19 at 6:59

5 votes

2 answers

391 views

On the number of distinct prime factors of $p^2+p+1$

CommunityBot

1

modified Dec 19 at 18:37

12 votes

1 answer

475 views

Generators for the first cohomology of free groups

Andy Putman

42.8k

answered Dec 18 at 22:21

10 votes

1 answer

486 views

Can automorphism equivalence in a free group be detected in a nilpotent quotient?

Andy Putman

42.8k

modified Dec 19 at 21:16

8 votes

2 answers

483 views

On martingale convergence

Martin Hairer

8,684

modified 2 days ago

9 votes

1 answer

286 views

Where does the definition of ($\infty$-)groupoid cardinality come from?

LSpice

10.6k

modified yesterday

5 votes

2 answers

198 views

How much Dependent Choice is provable in $Z_2$? And what about Projective Determinacy?

Gabe Goldberg

7,074

modified 18 hours ago

11 votes

2 answers

693 views

Generalisation of abelianisation using representation theory?

Geoff Robinson

41.8k

modified Dec 18 at 19:12

8 votes

1 answer

310 views

Are the Boolean algebras ${\cal P}(\omega)/(\text{fin})$ and ${\cal P}(\omega)/(\text{thin})$ isomorphic?

Joel David Hamkins

220k

modified Dec 21 at 21:32

6 votes

3 answers

484 views

Distributional derivatives are locally integrable implies the distribution is also locally integrable?

Giorgio Metafune

4,815

answered yesterday

6 votes

1 answer

749 views

Logical strength of a statement about vector spaces

Joel David Hamkins

220k

modified 2 days ago

6 votes

1 answer

336 views

Does every transitive permutation group contain a permutation whose cycle lengths have a common divisor?

Béranger Seguin

253

modified Dec 20 at 10:51

0 votes

1 answer

179 views

Is there any use of logarithmic derivatives of modular forms?

KConrad

49.1k

modified yesterday

6 votes

1 answer

222 views

Generating 21-vertex 4-regular plane graphs with 8 faces of degree 3 and 15 faces of degree 4

Gordon Royle

11.8k

modified Dec 20 at 6:26

7 votes

1 answer

443 views

Is there a direct translation between Tropical and Algebraic geometry?

Carlo Beenakker

173k

answered Dec 20 at 8:39

7 votes

1 answer

263 views

Approximating functions on the real line

Christian Remling

20.7k

answered Dec 19 at 20:22

7 votes

1 answer

202 views

Approximately semifinite factors

Stefaan Vaes

3,906

answered Dec 20 at 13:39

3 votes

1 answer

119 views

Symmetric tensor of highest weight modules for $\mathrm{SU}(2)$

Vít Tuček

8,149

answered Dec 21 at 21:44

1 vote

1 answer

312 views

Is the Ordering Principle equivalent to a selection principle?

Joel David Hamkins

220k

modified yesterday

4 votes

1 answer

221 views

Examples of Borel probability measures on the Schwartz function space?

Isaac

2,331

modified Dec 21 at 18:55

6 votes

1 answer

259 views

Is this $\mathbb C$-fibration over compact Riemann surface trivial?

Mjr

307

modified Dec 19 at 2:14

1 vote

3 answers

140 views

A rational distance problem with (possibly) multiple solutions

Daniel Asimov

2,468

modified 2 days ago

4 votes

2 answers

272 views

Another curious martingale

mike

1,004

answered Dec 21 at 6:08

2 votes

1 answer

163 views

Homotopy classes of homeomorphism vs. Homotopy classes of a biholomorphism

Sam Nead

24.5k

answered Dec 19 at 10:37

4 votes

1 answer

163 views

Truncated fixed point and regularity structures

YCor

59.4k

modified Dec 21 at 23:18

3 votes

2 answers

158 views

How to diagonalize this tridiagonal difference operator with unbounded coefficients?

Twi

2,168

answered Dec 20 at 18:11

5 votes

1 answer

154 views

Are there always measurables of high Mitchell rank below a supercompact?

Joel David Hamkins

220k

modified Dec 18 at 18:22

2 votes

1 answer

187 views

'$\times$' or '$\otimes$' when writing $L$-functions?

GH from MO

95.7k

modified Dec 21 at 14:13

0 votes

1 answer

177 views

Very ample + effective = ample?

Mohan

5,967

answered Dec 20 at 22:30

3 votes

1 answer

222 views

Root finding algorithm for an analytic function

poeaqnwgo

71

modified Dec 22 at 0:10

1 vote

2 answers

172 views

Isometric embeddings of $\Bbb H^3$

Deane Yang

26.6k

modified Dec 21 at 17:10

6 votes

1 answer

215 views

What conditions on an Abelian category allow members of a direct sum to be determined entirely by their components?

Denis T

4,299

modified 2 days ago

4 votes

1 answer

130 views

What are the possible blow up limits of an $L^1$ function?

Christian Remling

20.7k

answered 2 days ago

3 votes

1 answer

160 views

Weighted Lebesgue space with exponential weights: smoothing effect and properties

Ilovemath

563

modified Dec 18 at 23:44

3 votes

2 answers

121 views

Adjunctions and inverse limits of derived categories

Andrea Marino

1,856

modified 4 mins ago

2 votes

1 answer

199 views

Is the Fortissimo space on discrete $\omega_1$ radial?

Steven Clontz

933

modified 1 hour ago

4 votes

1 answer

240 views

Is there an elliptic curve analogue to the 4-term exact sequence defining the unit and class group of a number field?

Chris Wuthrich

7,961

answered 10 hours ago

3 votes

1 answer

112 views

Spectra of products variously permutated

Pietro Majer

55.5k

modified Dec 18 at 20:01

6 votes

0 answers

381 views

+50

Genus of a number field

Leonardo Lanciano

51

modified 2 days ago

6 votes

0 answers

357 views

Consistency results for divergent series summed with smooth cutoff functions

not all wrong

213

modified 2 days ago

3 votes

1 answer

111 views

Psychological test for Euclidean geometry

Carlo Beenakker

173k

modified 2 hours ago

2 votes

1 answer

233 views

Realizable geometrically finite hyperbolic 3-manifolds with prescribed conformal boundaries

Sam Nead

24.5k

modified 2 days ago

1 vote

1 answer

174 views

Calculating the value of periodic continued fractions with $a_i\in\lbrace 0,1\rbrace$

Michael Hardy

11.4k

modified yesterday

Top Questions

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

Recent Tags