MathOverflow

4

votes

1

answer

112

views

Homology of homotopy fixed point spectra

at.algebraic-topology homotopy-theory

8m ago Akhil Mathew 9,441●1●18●67

0

votes

1

answer

43

views

All properties of a mathematical object

9m ago Mike Crumley 147●6

2

votes

2

answers

285

views

Finding the Universal Ideal of a (Covariant) Differential Calculus

noncommutative-geometry qa.quantum-algebra hopf-algebras

20m ago MathOverflow♦ 1●2●3

0

votes

0

answers

16

views

morton brown’s theorem

gt.geometric-topology

53m ago Koushik 1

2

votes

1

answer

84

views

ad (A^n) is a polynomial in ad A ?

linear-algebra lie-algebras matrices

1h ago Vel Nias 1,408●3●17

0

votes

1

answer

72

views

Kervaire invariant: Why dimension 126 especially difficult?

gt.geometric-topology differential-topology dg.differential-geometry reference-request

1h ago Peter May 6,020●1●24●36

1

vote

0

answers

11

views

Is any morphism composition of smooth and radicial morphisms generically?

ag.algebraic-geometry

2h ago Vaibhav 53●2

0

votes

0

answers

7

views

Dealing with a Matrix ODE in integral form

differential-equations

2h ago PolvoAzul 1

12

votes

1

answer

337

views

Fundamental problems whose solution seems completely out of reach

dg.differential-geometry geometry convex-geometry big-list reference-request

2h ago quid 6,967●15●28

3

votes

3

answers

164

views

Are there any neat algorithm to factor a homogenous polynomial, given we know this polynomial factors into linear forms?

algebra

2h ago Igor Rivin 24.2k●3●27●53

3

votes

2

answers

170

views

+150

Defining ind-coherent sheaves and their singular support

ag.algebraic-geometry derived-algebraic-geometr

2h ago David Ben-Zvi 10.6k●26●45

3

votes

2

answers

123

views

Geometric Interpretations of Homotopy Theoretical Constructions

homotopy-theory at.algebraic-topology

3h ago cdouglas 1,518●3●19

4

votes

7

answers

556

views

ULTRAINFINITISM, or a step beyond the transfinite

set-theory lo.logic large-cardinals foundations math-philosophy

4h ago Asaf Karagila 3,428●1●11●27

6

votes

1

answer

840

views

Infimum of the Dirichlet form for a tensor product

pr.probability quadratic-forms

4h ago MathOverflow♦ 1●2●3

0

votes

0

answers

55

views

How to generate a list of primes using the fundamental theorem of arithmetic [closed]

arithmetic prime-numbers

4h ago leila 1

14

votes

1

answer

271

views

Is the ball reducible in some high dimension?

geometry lattices

5h ago Greg Kuperberg 33.2k●2●103●166

0

votes

0

answers

89

views

How small can {log p/q} be?

diophantine-approximation nt.number-theory

5h ago kiskis 1●1

0

votes

0

answers

25

views

Differentiability of minimax objective function with respect to a decision variable

oc.optimization-control cv.complex-variables

5h ago David Ketcheson 41●3

2

votes

2

answers

244

views

2-cycle of K3 surface

homology k3-surfaces cycles ag.algebraic-geometry

6h ago Karl Schwede 8,325●1●12●28

1

vote

1

answer

105

views

The operator $(\partial_x+i\partial_y)(\partial_x-i\partial_y)^{-1}$

cv.complex-variables

8h ago Terry Tao 22.5k●2●85●150

5

votes

1

answer

161

views

blow-ups of secant varieties

ag.algebraic-geometry

8h ago MathOverflow♦ 1●2●3

0

votes

0

answers

94

views

Open and closed sets used to define a topology [closed]

topology

9h ago unknown (google) 1

0

votes

0

answers

43

views

Product of weakly convergent sequences

fa.functional-analysis convergence duality schwartz-distributions

9h ago dcs24 17●4

0

votes

0

answers

40

views

Calculating a distributional derivative

fa.functional-analysis schwartz-distributions calculus real-analysis ap.analysis-of-pdes

10h ago dcs24 17●4

26

votes

3

answers

1k

views

before taking on a graduate student

soft-question advice

10h ago Jason Starr 1,205●3●9

8

votes

1

answer

302

views

+100

Interpretation of universal coefficients theorem for group cohomology

gr.group-theory group-cohomology

11h ago Vipul Naik 4,197●10●35

4

votes

1

answer

141

views

Given a Levy Exponent find the jump-measure and drift

pr.probability stochastic-processes

11h ago DASON 36●2

1

vote

1

answer

154

views

Fine/Coarse moduli spaces and extensions of fields.

ag.algebraic-geometry moduli-spaces

11h ago Martin Brandenburg 23.7k●1●26●102

0

votes

0

answers

93

views

IYO which item is good to be in a discrete mathematic book? [closed]

discrete-mathematics books

11h ago Ali Amiri 1●1

1

vote

1

answer

144

views

Homology and homotopy type for knot complements

gt.geometric-topology at.algebraic-topology knot-theory

12h ago Aru Ray 157●1●7

8

votes

2

answers

153

views

Are there any natural recursively but not primitive-recursively axiomatized theories?

lo.logic

12h ago Ali Enayat 3,019●1●6●15

2

votes

1

answer

249

views

Proper sobolev spaces invariant under no-linearities

fa.functional-analysis ap.analysis-of-pdes

12h ago MathOverflow♦ 1●2●3

1

vote

0

answers

38

views

Bonnesen’s inequality for non-simple curves

curves-and-surfaces isoperimetry geometric-measure-theory

12h ago Dorian 1,617●2●15

32

votes

8

answers

1k

views

What are some examples of interesting uses of the theory of combinatorial species?

co.combinatorics ct.category-theory

12h ago Nicolae Boicu 1

8

votes

2

answers

406

views

Homology versus cohomology of Lie groups

at.algebraic-topology lie-groups soft-question

13h ago Peter May 6,020●1●24●36

8

votes

0

answers

269

views

How does one understand geometric CFT in terms of modularity?

nt.number-theory class-field-theory ag.algebraic-geometry adeles

13h ago Makhalan Duff 3,442●2●32

29

votes

14

answers

4k

views

Errata for Atiyah-Macdonald

ac.commutative-algebra reference-request

14h ago Matt 1●2

2

votes

1

answer

268

views

Extremal curves with a “should pass through” constraint

variational-calculus

14h ago MathOverflow♦ 1●2●3

46

votes

38

answers

7k

views

Which popular games are the most mathematical?

big-list soft-question recreational game-theory

14h ago Junyan Xu 143●1●2●8

7

votes

15

answers

1k

views

nontrivial isomorphisms of categories

ct.category-theory

14h ago Martin Brandenburg 23.7k●1●26●102

2

votes

0

answers

152

views

Midpoint lattice polygons

discrete-geometry geometry ds.dynamical-systems stochastic-processes reference-request

15h ago Joseph O'Rourke 33k●1●35●156

0

votes

0

answers

95

views

What is the computational complexity of matrix multiplication? [closed]

matrices

15h ago inquirer 1

3

votes

1

answer

89

views

estimate of metric tensors in terms of curvatures

riemannian-geometry dg.differential-geometry

16h ago Anton Petrunin 11.9k●35●95

8

votes

2

answers

1k

views

Nonseparable example in dimension theory?

dimension-theory mg.metric-geometry examples gn.general-topology

18h ago MathOverflow♦ 1●2●3

2

votes

3

answers

146

views

prove that flat shape maximizes a functional

ca.analysis-and-odes it.information-theory sp.spectral-theory

20h ago Pierre robert 1

32

votes

1

answer

2k

views

Does Godel’s incompleteness theorem admit a converse?

lo.logic

21h ago Max 1●1

0

votes

0

answers

71

views

`$\Sigma^1_1$` and `$\Pi^1_1$` sets and the space of functions [closed]

descriptive-set-theory lo.logic

22h ago Cody 1●1

1

vote

1

answer

128

views

Pseudorandom Generator vs Constant Depth Circuits / Branching Programs

cs.cc.complexity-theory

1d ago MathOverflow♦ 1●2●3

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