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50

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28

answers

4k

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Old books you would like to have rewritten with high-quality typesetting

modified 2 hours ago Pedro Lauridsen Ribeiro 3,529

12

votes

2

answers

451

views

Find all $m$ such $2^m+1\mid5^m-1$

nt.number-theory divisors-multiples

modified 9 hours ago GH from MO 57.5k

18

votes

2

answers

1k

views

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ag.algebraic-geometry cv.complex-variables ho.history-overview mathematical-philosophy analytic-geometry

modified yesterday Donu Arapura 24.9k

13

votes

2

answers

445

views

Is a matrix similar to its transpose over $\mathbb{Z}_p$?

reference-request linear-algebra ac.commutative-algebra p-adic-numbers

modified 2 days ago A Stasinski 1,896

10

votes

2

answers

388

views

Are archimedean subextensions of ordered fields dense?

ac.commutative-algebra ordered-fields

answered 19 hours ago user44191 2,533

14

votes

1

answer

698

views

GAGA for stacks

ag.algebraic-geometry complex-geometry stacks gaga

answered 19 hours ago abx 23k

5

votes

3

answers

320

views

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nt.number-theory

answered Dec 13 at 18:59 Gerry Myerson 30.3k

1

vote

4

answers

399

views

how to solve $\sum_{i=0}^n (x-\mu_i)e^{-(x-\mu_i)^2} = 0$

na.numerical-analysis gaussian closed-form-expressions rootfinding

modified 16 hours ago Michael Hardy 5,544

21

votes

1

answer

310

views

Is there a short proof of the decidability of Kepler's Conjecture?

lo.logic discrete-geometry sphere-packing

answered Dec 15 at 8:08 Henry Cohn 13.7k

9

votes

2

answers

483

views

Certain matrices of interesting determinant

linear-algebra determinants elementary-proofs

answered 21 hours ago T. Amdeberhan 16.9k

11

votes

1

answer

556

views

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transcendental-number-theory p-adic

modified Dec 13 at 20:42 MCS 170

14

votes

1

answer

306

views

Schur-Weyl duality and q-symmetric functions

rt.representation-theory symmetric-groups symmetric-functions f-1 q-analogs

modified yesterday Alexander Chervov 11.1k

11

votes

1

answer

262

views

Map of Grassmannians associated with a Veronese embedding

ag.algebraic-geometry reference-request grassmannians

modified Dec 13 at 6:26 Francesco Polizzi 47.2k

10

votes

2

answers

167

views

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dg.differential-geometry gt.geometric-topology curves-and-surfaces seifert-surfaces

answered Dec 14 at 21:11 Ian Agol 48.7k

2

votes

2

answers

237

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exterior-algebra

modified 22 hours ago David E Speyer 105k

9

votes

1

answer

265

views

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ag.algebraic-geometry nt.number-theory modular-forms abelian-varieties rational-points

answered Dec 13 at 15:10 François Brunault 12.3k

11

votes

4

answers

320

views

Minimizing geodesics in incomplete Riemannian manifolds

dg.differential-geometry riemannian-geometry geodesics

modified Dec 15 at 2:45 Deane Yang 20k

5

votes

1

answer

391

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Percentage of Ramanujan's conjectures that were proven correct

ho.history-overview conjectures ramanujan

modified 1 hour ago Josiah Park 810

14

votes

1

answer

299

views

Homotopy fixed points of complex conjugation on $BU(n)$

at.algebraic-topology homotopy-theory equivariant-homotopy

modified Dec 14 at 12:34 John Rognes 4,171

3

votes

1

answer

258

views

does recursive (decidable) languages closed under division (Quotient) with any language?

computational-complexity computability-theory computer-science

modified Dec 13 at 11:28 Joel David Hamkins 163k

10

votes

1

answer

192

views

Elliptic curve over projective line with four points of multiplicative reduction

ag.algebraic-geometry

answered 18 hours ago Will Sawin 66.7k

14

votes

1

answer

291

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Conceptual explanation for curious linear-algebra fact in characteristic $2$

rt.representation-theory linear-algebra characteristic-2

modified Dec 12 at 23:55 dhy 3,033

5

votes

2

answers

223

views

Formula for a sum of product of binomials

co.combinatorics sequences-and-series enumerative-combinatorics

modified Dec 12 at 22:42 Michael Hardy 5,544

16

votes

1

answer

437

views

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ag.algebraic-geometry nt.number-theory reference-request algebraic-number-theory

answered Dec 13 at 22:04 Carlo Beenakker 72.4k

5

votes

1

answer

237

views

Universal property of sheaf category

ct.category-theory higher-category-theory sheaf-theory topos-theory

modified Dec 14 at 16:15 Simon Henry 14.6k

10

votes

1

answer

209

views

What does the classifying space of a topological monoid classify?

at.algebraic-topology classifying-spaces

answered Dec 14 at 7:07 Lennart Meier 6,179

19

votes

1

answer

190

views

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convex-geometry

modified Dec 14 at 0:18 Alexandre Eremenko 48.9k

4

votes

2

answers

184

views

Ideals invariant under ring automorphisms

rt.representation-theory ac.commutative-algebra ra.rings-and-algebras invariant-theory ideals

modified 2 days ago Hailong Dao 19.5k

11

votes

1

answer

134

views

Products of Cyclotomic Polynomials with Nonnegative Coefficients

polynomials cyclotomic-fields

modified yesterday Aaron Meyerowitz 23.8k

5

votes

1

answer

160

views

Half-dimensional torus fibration vs Lagrangian torus fibration

sg.symplectic-geometry fibration

modified Dec 13 at 10:13 Dmitri Panov 18.9k

6

votes

1

answer

182

views

Theory of surfaces in $\mathbb{R}^3$ as level sets

reference-request dg.differential-geometry textbook-recommendation teaching

modified Dec 14 at 7:07 Martin Sleziak 2,900

1

vote

2

answers

197

views

Examples of group $G=N \rtimes H$ where $N$ and $H$ are as below

gr.group-theory lie-groups ergodic-theory

answered Dec 13 at 19:06 Victor Petrov 884

11

votes

1

answer

318

views

Finiteness or infiniteness for Galois representations with unusual Hodge numbers

ag.algebraic-geometry nt.number-theory automorphic-forms galois-representations

modified Dec 15 at 9:53 Anwesh Ray 764

4

votes

1

answer

145

views

The automorphism group of a symplectic symmetric space

sg.symplectic-geometry connections symmetric-spaces

answered Dec 12 at 13:19 Robert Bryant 72.8k

7

votes

1

answer

141

views

Effective set= ordinal definable set

set-theory lo.logic

modified 23 hours ago Joel David Hamkins 163k

7

votes

1

answer

216

views

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measure-theory fourier-analysis hilbert-spaces

modified 2 days ago user521337 469

2

votes

1

answer

159

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dg.differential-geometry ap.analysis-of-pdes differential-equations differential-topology

modified Dec 14 at 16:15 MK7 60

2

votes

1

answer

153

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Decomposition into irreducible of a representation of the wreath product $S_d\wr S_n$

rt.representation-theory finite-groups symmetric-groups

modified Dec 13 at 6:17 Dan Petersen 25.3k

1

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1

answer

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gn.general-topology real-analysis

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5

votes

1

answer

139

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$Lf^*$ is fully faithful

ag.algebraic-geometry derived-categories derived-functors

modified Dec 11 at 18:52 Mohsen Karkheiran 216

3

votes

1

answer

290

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Improvements to one's own theorems

big-list gm.general-mathematics journals

answered yesterday Sam Hopkins 4,160

9

votes

1

answer

174

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Rothberger property for finite covers

set-theory gn.general-topology measure-theory selection-principles

modified 2 days ago Boaz Tsaban 1,196

8

votes

1

answer

283

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ag.algebraic-geometry

modified Dec 13 at 9:24 Leo Alonso 5,221

8

votes

1

answer

218

views

Functoriality of (co)limits in $\infty$-categories

ct.category-theory higher-category-theory infinity-categories limits-and-colimits

modified Dec 13 at 18:12 Kevin Carlson 455

4

votes

1

answer

131

views

Сoincidence of discrete random variables

pr.probability inequalities expectation

modified Dec 12 at 22:53 Michael Hardy 5,544

5

votes

2

answers

102

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What do we know about the ramification of the modularity map $X_0(N)\to E$?

elliptic-curves modular-forms algebraic-curves

answered 1 hour ago François Brunault 12.3k

5

votes

1

answer

119

views

Bounds on the L^1 norm of a discrete Fourier spectrum

fourier-analysis inequalities

answered Dec 13 at 20:34 Robert Israel 41.2k

5

votes

1

answer

118

views

Schutzenberger's evacuation and $\mu$-coefficient of Kazhdan–Lusztig polynomials

reference-request co.combinatorics rt.representation-theory young-tableaux kazhdan-lusztig

modified Dec 14 at 1:25 LSpice 2,823

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