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1

vote

1

answer

303

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“thematic” algebras

1m ago MathOverflow♦ 1●2●3

4

votes

2

answers

218

views

Cofibrant replacements of a given object in a combinatorial model category

at.algebraic-topology model-categories

1m ago MathOverflow♦ 1●2●3

33

votes

12

answers

2k

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Why don’t more mathematicians improve Wikipedia articles?

soft-question

28m ago Alexander Chervov 7,103●1●16●41

2

votes

1

answer

527

views

Pole data of meromorphic matrix function

complex-analysis linear-algebra

1h ago MathOverflow♦ 1●2●3

0

votes

1

answer

122

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Equivalent Markov Random Fields

markov-chains pr.probability graph-theory

1h ago MathOverflow♦ 1●2●3

0

votes

0

answers

16

views

Transitive subgroup of $S_p$ containing a $p$-cycle and a double transposition

gr.group-theory finite-groups permutation-groups

1h ago Ravi Jagadeesan 61●1

1

vote

0

answers

27

views

Quotient of 3-sphere by binary octahedral group?

gt.geometric-topology gr.group-theory lie-groups differential-topology dg.differential-geometry

1h ago fuzzytron 1,690●6●16

13

votes

2

answers

589

views

A curious sequence of rationals: finite or infinite?

nt.number-theory collatz-conjecture rational-functions

1h ago Barry Cipra 3,369●1●8●18

6

votes

1

answer

74

views

Permutations of prescribed cycle types that multiply to the identity

co.combinatorics permutations permutation-groups algebraic-curves

1h ago Ravi Jagadeesan 61●1

0

votes

0

answers

38

views

Inverse Function Theorem in Algebraic Geometry

ag.algebraic-geometry

1h ago PDC 627●5

28

votes

5

answers

10k

views

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writing latex

1h ago Leonid Dworzanski 142●1●4●9

15

votes

1

answer

163

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A double grading of catalan numbers

catalan-numbers co.combinatorics tutte-polynomials

1h ago F Castillo 1

7

votes

1

answer

174

views

Semicontinuity for complexes

ag.algebraic-geometry

2h ago MathOverflow♦ 1●2●3

15

votes

1

answer

970

views

every abelian scheme quotient of a Picard scheme?

abelian-schemes ag.algebraic-geometry

2h ago MathOverflow♦ 1●2●3

-1

votes

1

answer

113

views

Uniformly converge? [closed]

convergence

2h ago Angela Richardson 11●1

0

votes

1

answer

60

views

n balls, k colors, expected color change problem [closed]

co.combinatorics pr.probability

2h ago Butch Malahide 700●2●8

15

votes

3

answers

626

views

What is known about the birational involutions of P^3?

ag.algebraic-geometry birational-geometry

2h ago Jérémy Blanc 1,598●1●4●13

3

votes

1

answer

230

views

Fastest Digit Extraction for Any Irrational Number

nt.number-theory algorithms

3h ago MathOverflow♦ 1●2●3

0

votes

1

answer

100

views

Linear least squares: overdetermined system necessary? and representing nonunique solutions

linear-algebra

3h ago MathOverflow♦ 1●2●3

0

votes

0

answers

32

views

Representing discrete groups in orthogonal groups

mg.metric-geometry gr.group-theory rt.representation-theory

3h ago Lisa Carbone 11

6

votes

3

answers

200

views

Rate of growth of an explicit integral

integral-transforms integral-geometry feynman-diagram convex-polytopes

3h ago Fantastic 73●3

3

votes

3

answers

500

views

In What Sense is Set Theory a ‘Foundation’ for Mathematics? [closed]

math-philosophy metamathematics set-theory

3h ago Gerhard Paseman 863●1●4●4

1

vote

0

answers

25

views

Hahn-Banach restricted to a pre-dual

fa.functional-analysis hahn-banach-theorem locally-convex-spaces

3h ago Igor Khavkine 3,128●1●10●18

1

vote

1

answer

256

views

Good Computer Package for Calculating Inverse of a Formal Power Series?

computer-algebra mathematical-software

3h ago Ricardo Andrade 2,414●1●9●18

17

votes

5

answers

450

views

$n$-in-a-row game on $\mathbb{R}^2$

game-theory

3h ago fedja 19.5k●2●46●94

0

votes

0

answers

27

views

global sections of structure sheaf on the toric Calabi-Yau

toric-varieties ag.algebraic-geometry co.combinatorics ac.commutative-algebra

3h ago Eleanor Von Hohlandsbourg 75●4

22

votes

1

answer

3k

views

Open map D⁴ → S²

gt.geometric-topology differential-topology

4h ago MathOverflow♦ 1●2●3

8

votes

1

answer

232

views

What are the simple Lie superalgebras of type E?

ra.rings-and-algebras lie-superalgebras kac-moody-algebras mp.mathematical-physics lie-algebras

4h ago MathOverflow♦ 1●2●3

71

votes

54

answers

14k

views

Which math paper maximizes the ratio (importance)/(length)?

soft-question math-communication

4h ago Kevin Ventullo 3,224●10●20

2

votes

0

answers

38

views

Elements of low multiplicative order and computing square roots modulo composites

nt.number-theory factorization

4h ago Stefan Kohl 2,600●2●15

0

votes

3

answers

245

views

Are there analogous theorems and/or techniques for solving fractional differential equations involving the Riesz Derivative?

fractional-calculus

5h ago MathOverflow♦ 1●2●3

1

vote

1

answer

144

views

Law of motion of the expectation of the integral of a difussion

stochastic-calculus

5h ago MathOverflow♦ 1●2●3

0

votes

0

answers

25

views

Relation between BV and W^{s,1}

sobolev-spaces

5h ago Gerardo 1

0

votes

0

answers

31

views

Trace theorem for W^{s,1}

sobolev-spaces

5h ago Gerardo 1

0

votes

2

answers

139

views

A question about time in Special and General Relativity.

mp.mathematical-physics

5h ago The User 420●8

1

vote

0

answers

88

views

Is a certain group related to a primitive L function isomorphic to $Gal(\overline{\mathbb{Q}}_{\ell}/\mathbb{Q}_{\ell})$ for some $\ell$?

nt.number-theory abstract-algebra selberg-class

5h ago Sylvain JULIEN 671●3●10

5

votes

1

answer

252

views

Classification of geometric outer automorphisms of free groups

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

5h ago Lee Mosher 5,916●1●9●26

0

votes

1

answer

75

views

Universal covering of compact surfaces

at.algebraic-topology gt.geometric-topology

5h ago Lee Mosher 5,916●1●9●26

0

votes

1

answer

67

views

Sequences satisfying gcd(S(x), S(y)) = S(gcd(x,y))

nt.number-theory

5h ago Joe Silverman 7,860●24●46

32

votes

5

answers

680

views

+550

How closed-form conjectures are made?

ca.analysis-and-odes math-philosophy closed-form-expressions conjectures soft-question

5h ago S. Sra 10.1k●1●16●44

0

votes

1

answer

109

views

the first eigenfunction of Dirichlet problem

ap.analysis-of-pdes eigenvalue

6h ago MathOverflow♦ 1●2●3

7

votes

0

answers

54

views

Construction of exotic spheres that do not bound parallelizable manifolds

at.algebraic-topology gt.geometric-topology differential-topology smooth-structures smooth-manifolds

6h ago Ben Knudsen 161●2

5

votes

2

answers

195

views

Quotient of a reductive group by a non-smooth subgroup

ag.algebraic-geometry algebraic-groups group-schemes homogeneous-spaces characteristic-p

6h ago Jim Humphreys 26.1k●38●85

6

votes

1

answer

163

views

Is it possible to generalize functions like $x^y, \ln x, \sin x, \arctan x$ to surreal numbers or surcomplex numbers?

ca.analysis-and-odes lo.logic set-theory surreal-numbers surreal-analysis

6h ago OlegK 61●2

-4

votes

1

answer

117

views

How is the expected fraction of zeros correctly calculated when throwing bits? [closed]

pr.probability

6h ago Henry Cohn 6,909●1●24●41

4

votes

2

answers

194

views

Good effective versions of theorems of Artin and Brauer

rt.representation-theory finite-groups reference-request

6h ago Geoff Robinson 9,936●1●21●27

0

votes

1

answer

81

views

Var(A*x) in the multivariate case and how to generalize squares from single to multivariate domain in general

st.statistics linear-algebra

7h ago MathOverflow♦ 1●2●3

0

votes

1

answer

196

views

Replacing large-dimensional ODE systems with one PDE

ca.analysis-and-odes ap.analysis-of-pdes ds.dynamical-systems

7h ago MathOverflow♦ 1●2●3

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