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0

votes

0

answers

3

views

Bounding the product of exponents

nt.number-theory

2m ago Eugene 729●8

0

votes

1

answer

4

views

the algebraic closure of strict henselian DVR

ag.algebraic-geometry ac.commutative-algebra

2m ago Will Sawin 3,540●7●16

0

votes

0

answers

4

views

The norm-closed unit ball of C0 is not weakly compact

functional-analysis

17m ago Ali 1

0

votes

0

answers

4

views

The weak-topology of X is metrizable if only and if X has a finite or countable Hamel basis.

fa.functional-analysis

24m ago Ali 1

9

votes

1

answer

379

views

unbounded self-adjoint operator as Killing vector fields

dg.differential-geometry mp.mathematical-physics ag.algebraic-geometry

38m ago MathOverflow♦ 1●2●3

3

votes

2

answers

420

views

Fast algorithms for addition and multiplication of Zhegalkin polynomials

lo.logic algorithms polynomials

38m ago MathOverflow♦ 1●2●3

1

vote

3

answers

85

views

Canonical form of symmetric integer matrix M

nt.number-theory linear-algebra

59m ago Will Jagy 10.6k●1●20●40

12

votes

4

answers

339

views

Does $(x^2 - 1)(y^2 - 1) = c z^4$ have a rational point, with z non-zero, for any given rational c?

ag.algebraic-geometry nt.number-theory rational-points k3-surfaces

1h ago Noam D. Elkies 13.7k●3●42●71

2

votes

1

answer

63

views

Finite nilpotent orbits: GL(n,q)-conjugacy classes and a partial order on partitions

rt.representation-theory gr.group-theory

2h ago Will Sawin 3,540●7●16

3

votes

1

answer

81

views

Computing the Euler characteristic of the complex projective plane using differential topology

differential-topology

2h ago Igor Rivin 22.1k●3●25●49

2

votes

0

answers

23

views

(Non) existence of families of odd integers with special additive decomposition

nt.number-theory analytic-number-theory

3h ago unknown (google) 261●6

1

vote

2

answers

40

views

Converting a recursive definition to an explicit one

sequences-and-series combinatorial-identities co.combinatorics

3h ago Mark Sapir 22.7k●2●52●107

8

votes

1

answer

276

views

Vitali Sets vs Bernstein Sets…

descriptive-set-theory measure-theory

3h ago Yu 456●3●6

5

votes

2

answers

119

views

Elementary applications of Krein-Milman

fa.functional-analysis examples

3h ago Adam Azzam 61●6

10

votes

5

answers

1k

views

How does one motivate the analytic continuation of the Riemann zeta function?

zeta-functions

4h ago Tom Copeland 461●1●14

2

votes

3

answers

60

views

Properties preserved under passage to augmented filtration

pr.probability stochastic-processes martingales filtrations

4h ago Stephan Sturm 56●1●1●3

3

votes

0

answers

66

views

Reasonable implementation of finding Gröbner bases over non-field coefficient rings

computer-algebra ac.commutative-algebra groebner-bases

5h ago Charles Staats 3,709●1●10●39

5

votes

1

answer

203

views

Is there a cheap proof that (homotopy) endomorphisms are functorial?

at.algebraic-topology model-categories operads ct.category-theory homotopy-theory

5h ago Denis-Charles Cisinski 4,285●10●19

7

votes

0

answers

127

views

Codimension Two Embeddings in Goodwillie-Weiss Manifold Calculus, and The Difficulty of Fundamental Groups

at.algebraic-topology fundamental-group manifold calculus

5h ago Hiro Lee Tanaka 838●5●10

2

votes

2

answers

393

views

lim Ext(a^n/b^n,R)=0

ac.commutative-algebra commutative-rings

5h ago anna 206●7

0

votes

0

answers

50

views

vanishing local cohomology

ac.commutative-algebra commutative-rings homological-algebra cohomology

6h ago sara 1

2

votes

1

answer

127

views

Estimate for products of integers that are relatively prime with $N$

prime-numbers reference-request

6h ago Gerhard Paseman 436●1●3

1

vote

0

answers

28

views

Concentration of functions of random unitary matrices

random-matrices measure-concentration pr.probability

6h ago Michal Kotowski 861●4●17

2

votes

3

answers

94

views

When is a three-manifold deck transformation group solvable?

gt.geometric-topology fundamental-group 3-manifolds solvable-groups

6h ago Igor Rivin 22.1k●3●25●49

1

vote

0

answers

10

views

Trivial Hopf Coinvariant Subspace Example

hopf-algebras qa.quantum-algebra quantum-group

7h ago Dyke Acland 551●3●9

2

votes

1

answer

179

views

Maximal ideals of Z[x,y]

ac.commutative-algebra commutative-rings

7h ago David White 2,300●1●10●23

0

votes

1

answer

22

views

Continuity of Lexicographic Minimum Solution of a parametrized LP problem

linear-programming continuity

8h ago Brian Borchers 1,916●1●2●8

1

vote

1

answer

198

views

Finding the Universal Ideal of a (Covariant) Differential Calculus

noncommutative-geometry qa.quantum-algebra hopf-algebras

8h ago MathOverflow♦ 1●2●3

2

votes

1

answer

92

views

Choice of predictable (or jointly measurable) eigenvalues and eigenvectors of nuclear-operator-valued stochastic process

pr.probability stochastic-processes fa.functional-analysis measure-theory

8h ago MathOverflow♦ 1●2●3

1

vote

0

answers

37

views

Brownian motion & time shift

pr.probability stochastic-processes

8h ago Laurent Bienvenu 83●3

11

votes

5

answers

349

views

How far is a set of vectors from being orthogonal?

linear-algebra projective-geometry operator-theory

9h ago John Wiltshire-Gordon 1,862●1●4●18

0

votes

0

answers

65

views

Liouville’s Approximation Theorem [closed]

transcendence

9h ago quid 6,467●14●27

0

votes

1

answer

70

views

Weierstrass Factorization Theorem [closed]

real-analysis complex-analysis

10h ago unknown (google) 1●1

0

votes

1

answer

150

views

Open problems in SCV

cv.complex-variables

10h ago unknown (google) 1●1

0

votes

0

answers

55

views

Liminf and Limsup of a sequence of sets [closed]

pr.probability measure-theory set-theory

10h ago jbal 1

0

votes

0

answers

88

views

How to prove inequality [closed]

inequality

10h ago Sh N 1●1

6

votes

1

answer

807

views

Infimum of the Dirichlet form for a tensor product

pr.probability quadratic-forms

10h ago MathOverflow♦ 1●2●3

3

votes

3

answers

223

views

Embedding dimension=minimum dimension of a local embedding?

ag.algebraic-geometry ac.commutative-algebra

10h ago Will Sawin 3,540●7●16

3

votes

1

answer

67

views

Is the exponential map of a $C^{1,1}$ Riemannian metric a local homeomorphism?

riemannian-geometry

11h ago Anton Petrunin 11.1k●34●93

15

votes

1

answer

359

views

+100

Asymptotics of the growth rate of a group

gr.group-theory geometric-group-theory

11h ago Kate Juschenko 3,132●4●24

16

votes

23

answers

4k

views

Examples of interesting false proofs

recreational

11h ago John Engbers 53●6

1

vote

2

answers

110

views

Sheafification of a presheaf through the etale space

sheaf-theory

11h ago Pietro Majer 14.7k●1●17●51

9

votes

2

answers

388

views

Vigorous actions on the Cantor set

gr.group-theory

12h ago Lee Mosher 1,640●5●13

0

votes

1

answer

84

views

higher fourier analysis: splitting periodic parts and ‘nilsequence’ noise ?

fourier-analysis ca.analysis-and-odes

12h ago Henry Towsner 1,277●2●11

2

votes

1

answer

214

views

Homeomorphism classification of 4-manifolds

4-manifold smooth-manifold gt.geometric-topology four-manifolds

12h ago Misha 4,537●12●25

0

votes

1

answer

64

views

eigenfunctions -> characteristic factors

ds.dynamical-systems

12h ago Henry Towsner 1,277●2●11

6

votes

3

answers

183

views

Special divisor function summation

nt.number-theory

13h ago js 510●9

21

votes

6

answers

2k

views

Cubical vs. simplicial singular homology

at.algebraic-topology

13h ago Ronnie Brown 2,477●16●9

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