Math Overflow

2

votes

1

answer

48

views

Mittag-Leffler condition

homological-algebra

11m ago Yemon Choi 2,426●2●13

3

votes

1

answer

38

views

An algebraic proof of Mumford’s smoothness criterion for surfaces?

20m ago F Zaldivar 21●1

4

votes

1

answer

109

views

Is there a canonical Hopf structure on the center of a universal enveloping algebra?

lie-algebras hopf-algebras rt.representation-theory quantum-topology

24m ago Pavel Etingof 1,136●2●8

30

votes

21

answers

5k

views

Magic trick based on deep mathematics

general popularization soft-question

35m ago zeb 872●2●8

8

votes

5

answers

211

views

Invariant Polynomials under a Group Action (hidden GIT)

ag.algebraic-geometry algebra group-actions

48m ago Tyler Lawson 4,757●8●26

13

votes

2

answers

99

views

What do heat kernels have to do with the Riemann-Roch theorem and the Gauss-Bonnet theorem?

dg.differential-geometry manifolds ap.analysis-of-pdes ag.algebraic-geometry

1h ago José Figueroa-O'Farrill 4,235●3●23

3

votes

0

answers

9

views

Integrable solutions to an elliptic PDE on divergence form have a definite sign

ap.analysis-of-pdes

1h ago Harald Hanche-Olsen 2,113●1●16

3

votes

2

answers

237

views

Proof of Bloch-Kato conjecture of K-theory?

kt.k-theory-homology

1h ago Julian 11●1

13

votes

6

answers

442

views

What is a topological space?

gn.general-topology ag.algebraic-geometry noncommutative-geometry oa.operator-algebras

1h ago Tom Leinster 3,603●3●24

4

votes

3

answers

68

views

PDE on manifolds

dg.differential-geometry differential-equations at.algebraic-topology

1h ago Justin Curry 355●10

7

votes

2

answers

137

views

The ‘real’ use of Quantum Algebra, Non-commutative Geometry, Representation Theory, and Algebraic Geometry to Physics

qa.quantum-algebra noncommutative-geometry ag.algebraic-geometry big-picture mp.mathematical-physics

2h ago José Figueroa-O'Farrill 4,235●3●23

3

votes

1

answer

48

views

Joint Law with 2 marginals and marginal of the spread

st.statistics pr.probability

2h ago has2 128●4

9

votes

5

answers

292

views

MaxSpec, Spec, … “RadSpec”? Or, why not look at all radical ideals?

ag.algebraic-geometry

2h ago Qiaochu Yuan 9,763●12●77

11

votes

3

answers

162

views

Understanding the definition of the Lefschetz (pure effective) motive

ag.algebraic-geometry motives monoidal-categories

2h ago Evgeny Shinder 602●10

2

votes

1

answer

81

views

What manifold has $\mathbb{H}P^{odd}$ as a boundary?

fibre-bundles dg.differential-geometry at.algebraic-topology

2h ago Ryan Budney 3,285●4●21

4

votes

1

answer

75

views

What is the relationship between t-structure and Torsion pair?

triangulated-categories ct.category-theory

2h ago Greg Stevenson 2,330●3●12

23

votes

15

answers

2k

views

Depressed graduate student.

mathematics-education soft-question

2h ago Anonymous 69●3

0

votes

0

answers

20

views

Why is solving a MILP w/o an objective function so much faster?

optimization oc.optimization-control

2h ago Harald Schilly 1

3

votes

1

answer

97

views

A regularity property of transition matrices for the cat map

ds.dynamical-systems symbolic-dynamics ergodic-theory

3h ago Steve Huntsman 2,073●1●14

3

votes

1

answer

133

views

Jack polynomials as determinants

symmetric-functions co.combinatorics rt.representation-theory

3h ago Sasha 31●3

0

votes

0

answers

23

views

reflection formula for lerch zeta function

analysis

3h ago vilvarin 71●3

6

votes

6

answers

133

views

Density of numbers having large prime divisors (formalizing heuristic probability argument)

nt.number-theory pr.probability

3h ago Victor Miller 251●1●7

-4

votes

1

answer

104

views

cauchy product for general case

analysis

4h ago Leonid Kovalev 1,257●2●15

3

votes

1

answer

115

views

Galois group of a product of polynomials

algebra

4h ago Johannes Hahn 161●5

4

votes

2

answers

183

views

What is the probability distribution function for the product of two correlated Gaussian random variable?

pr.probability

4h ago Yemon Choi 2,426●2●13

3

votes

1

answer

45

views

Does a Cayley graph on a minimal symmetric set of generators determine a finite group up to isomorphism?

gr.group-theory co.combinatorics

4h ago David Eppstein 2,616●4●10

2

votes

1

answer

108

views

Almost but not quite a homomorphism

gr.group-theory

5h ago Andrew Stacey 5,243●1●36

4

votes

1

answer

119

views

Primes of the form a^2+1

nt.number-theory prime-numbers analytic-number-theory

5h ago Darsh Ranjan 2,370●3●16

15

votes

13

answers

2k

views

The importance of EGA and SGA for “students of today”

ag.algebraic-geometry

5h ago Ravi Vakil 318●1●7

6

votes

0

answers

37

views

Can the Quantum Torus be realized as a Hall Algebra?

qa.quantum-algebra geometric-representation hall-algebras

6h ago Greg Muller 2,079●3●18

8

votes

1

answer

110

views

Intuition for Primitive Cohomology

ag.algebraic-geometry complex-geometry cohomology

6h ago Ilya Nikokoshev 5,676●7●29

0

votes

3

answers

159

views

“Interesting” properties of sets of natural numbers

arithmetic analysis set-theory soft-question

6h ago François G. Dorais 1,904●2●11

0

votes

2

answers

108

views

Existence of an “anti-additive” (or “never linear”) map?

analysis algebra

6h ago Dmitri 3,397●4●21

1

vote

1

answer

83

views

How many rings exist when ring is subspace of finite dimentional vector space?

ra.rings-and-algebras

6h ago Mariano Suárez-Alvarez 7,460●10●36

11

votes

4

answers

431

views

When to start reviewing

career big-list opinion

7h ago JS Milne 2,293●3●18

5

votes

2

answers

148

views

+150

Do there exist small neighborhoods in a classical mechanical system without pairs of focal points?

mp.mathematical-physics differential-equations sg.symplectic-geometry

7h ago Theo Johnson-Freyd 4,360●2●22

3

votes

1

answer

89

views

Maximizing Sparsity in l1 Minimization?

oc.optimization-control na.numerical-analysis mg.metric-geometry

7h ago fuzzytron 640●7

-1

votes

1

answer

79

views

Kronecker product definition

tensor-product

7h ago Qiaochu Yuan 9,763●12●77

13

votes

1

answer

294

views

What does the incidence algebra of the lattices in C tell us about modular forms?

modular-forms cv.complex-variables co.combinatorics

7h ago Steve Huntsman 2,073●1●14

18

votes

6

answers

307

views

Applications of Noncommutative Geometry

ag.algebraic-geometry noncommutative-geometry motivation

8h ago Hailong Dao 2,068●12

13

votes

7

answers

563

views

Simplicial objects

derived-category simplicial-stuff at.algebraic-topology

8h ago Timo Schürg 772●7

3

votes

2

answers

109

views

Questions Suggested by the Parabolic Subgroup Definition

ag.algebraic-geometry complex-geometry

9h ago Victor Ostrik 121●1

14

votes

24

answers

775

views

Your favorite surprising connections in Mathematics

big-list

9h ago Zavosh 91●1●3

6

votes

3

answers

262

views

A “round” lattice with low kissing number?

lattice nt.number-theory geometry co.combinatorics convexity

9h ago Gil Kalai 1,833●6●29

5

votes

1

answer

84

views

Integrable dynamical system - relation to elliptic curves

big-picture elliptic-curves integrable-systems ds.dynamical-systems

10h ago Charles Siegel 5,253●1●7●38

5

votes

1

answer

121

views

Freedman’s work on non-simply-connected 4-manifolds

gt.geometric-topology k-theory reference-request

10h ago Ryan Budney 3,285●4●21

9

votes

5

answers

356

views

Tate Cohomology via Stable Categories

group-cohomology triangulated-categories

10h ago Shizhuo Zhang 732●1●8

0

votes

3

answers

114

views

Given is “model”. How many theories may it be a model?

model-theory big-picture metamathematics

11h ago Joel David Hamkins 5,608●7●32

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