MathOverflow

1

vote

1

answer

135

views

Bounding Roots of a Polynomial by Coefficients

polynomials

10m ago MathOverflow♦ 1●2●3

1

vote

0

answers

13

views

3-edge-coloring of 3-regular multigraphs

graph-colorings

19m ago Forest Tong 11●1

9

votes

1

answer

345

views

A natural refinement of the $A_n$ arrangement is to consider all $2^n-1$ hyperplanes given by the sums of the coordinate functions. Have you seen this arrangement? Is it completely intractable?

19m ago Erik Aas 147●1●6

0

votes

0

answers

4

views

How do I calculate the “Area under the curve” AUC given TPR and FPR values?

st.statistics curves-and-surfaces

20m ago Lyle 1

3

votes

1

answer

30

views

How did Hankel determinants get the name Hankel-Hadamard?

linear-algebra ho.history-overview

25m ago Carlo Beenakker 6,169●10●21

3

votes

0

answers

25

views

Taylor Series and Fourier Series

fa.functional-analysis

42m ago Atif 33●1

0

votes

0

answers

8

views

Understanding the rationale behind “batch means” estimation

st.statistics ho.history-overview na.numerical-analysis

1h ago Karmic Mishap 1

2

votes

1

answer

168

views

Where did Sophus Lie write the group commutator for two one parameter groups.

ho.history-overview reference-request dg.differential-geometry lie-groups

1h ago Francois Ziegler 1,957●1●8●11

3

votes

1

answer

38

views

Local boundary symmetrisation of Riemannian metrics by coordinate changes

dg.differential-geometry

1h ago Anton Petrunin 16.6k●42●110

3

votes

0

answers

30

views

Simultaneous Linear System

matrix-equations vector linear-algebra

2h ago Ken 31●1

8

votes

1

answer

775

views

What is Kirillov’s method good for?

homotopy-theory rt.representation-theory mp.mathematical-physics quantization line-bundles

2h ago Hassan Jolany 1,180●1●2●12

1

vote

0

answers

39

views

Irreducibility of the trinomial over Q

polynomials number-fields

2h ago Rachel 11●1

7

votes

1

answer

230

views

what is the cyclic cover trick?

ag.algebraic-geometry algebraic-curves algebraic-surfaces covering

2h ago quid 13.6k●33●54

1

vote

1

answer

71

views

Lower Degree Elements in an Algebraic Number Field

nt.number-theory algebraic-number-theory number-fields primitive-elements

2h ago quid 13.6k●33●54

1

vote

0

answers

19

views

Upper semicontinuity of Betti numbers of submodules

reference-request ac.commutative-algebra

2h ago quid 13.6k●33●54

3

votes

1

answer

82

views

Aubin’s book - construction of Green’s function on compact manifold

riemannian-geometry

2h ago macbeth 1,229●6●14

3

votes

1

answer

140

views

Why is there no stack of $\ell$-adic sheaves on a curve?

ag.algebraic-geometry stacks sheaves

2h ago Jacob Lurie 6,774●27●38

1

vote

1

answer

92

views

Numerical multivariate definite integration

integration

3h ago Javier 11●2

4

votes

5

answers

1k

views

totally disconnected and zero-dimensional spaces

reference-request gn.general-topology

3h ago Joseph Van Name 2,491●5●14

1

vote

1

answer

21

views

Construction of an integral point set given the set of distances ,its minimal description so as to get a measure of its complexity and its unique identifier.

geometry

3h ago Joseph O'Rourke 44.1k●1●50●216

3

votes

1

answer

122

views

What new primitive recursive functions are needed to reconcile Turing time complexity with Godel time complexity?

computability-theory computer-science computational-complexity

3h ago Dan Turetsky 205●4

8

votes

1

answer

84

views

Intersection of localization with finitely generated subalgebra of fraction field

ac.commutative-algebra localization

3h ago David Speyer 56.3k●3●103●242

4

votes

1

answer

82

views

Proper-class sized “ring” with no maximal ideals

ac.commutative-algebra set-theory axiom-of-choice

3h ago François G. Dorais♦ 23.2k●2●52●116

0

votes

1

answer

80

views

For any n and some prime p there is an elemnet in Zp* of order n [closed]

gr.group-theory finite-groups algebraic-number-theory prime-numbers

4h ago katz 1,279●1●12

18

votes

8

answers

1k

views

How many proofs that $\pi_n(S^n)=\mathbb{Z}$ are there?

at.algebraic-topology homotopy-theory big-list

4h ago Johannes Ebert 11.6k●33●56

3

votes

1

answer

55

views

Finite generation of the commutator subgroup of the pure braid group

gt.geometric-topology braid-groups gr.group-theory

4h ago Mark Sapir 28k●2●57●120

4

votes

0

answers

68

views

What makes the Cartier operator “tick”?

ag.algebraic-geometry nt.number-theory arithmetic-geometry

4h ago Dan Petersen 10.4k●1●22●46

0

votes

0

answers

12

views

Distribution of a Ratio of Correlated Gamma Random Variables

pr.probability

4h ago ayman 1

2

votes

2

answers

138

views

When an exact embedding of abelian categories induces a full embedding of their derived categories?

homological-algebra kt.k-theory-homology derived-category

5h ago Leonid Positselski 6,893●1●16●36

-1

votes

1

answer

69

views

Dominant morphism of Affine Scheme

ag.algebraic-geometry

5h ago John Stalfos 29●1●4

1

vote

0

answers

39

views

Local components of quaternionic modular forms

nt.number-theory modular-forms galois-representations

5h ago Konrad 187●4

1

vote

2

answers

882

views

Has the Fundamental Theorem of Algebra been proved using just fixed point theory? [closed]

fixed-point-theorems reference-request

5h ago Benjamin Dickman 2,004●1●6●24

1

vote

0

answers

99

views

Diophantine: a^n + b^n + c^n = d^n and a^n + b^n = c^n + d^n

nt.number-theory diophantine-equations ask-noam

5h ago Sams 477●8

0

votes

0

answers

25

views

local deformation functor of cuspidal curve

deformation-theory ag.algebraic-geometry

6h ago Stiger 11●1

1

vote

0

answers

44

views

Are there some numerical test to check if a map is a contraction?

oc.optimization-control na.numerical-analysis

6h ago Nicolas Essis-Breton 121●4

0

votes

2

answers

513

views

fourier series of b-spline

fourier-analysis

6h ago Frank 1

3

votes

2

answers

718

views

How can I understand the “groupoid” quotient of a group action as some sort of “product”?

groupoids ct.category-theory

6h ago Ronnie Brown 5,496●20●21

13

votes

1

answer

252

views

Is there an online encyclopedia of Diophantine equations (OEDE)?

diophantine-equations

7h ago Sams 477●8

0

votes

1

answer

83

views

Morphsim from F_p[[X_1,…,X_d]].

ac.commutative-algebra

7h ago Abhinav Kumar 1,819●8●11

49

votes

11

answers

3k

views

Are there any good websites for hosting discussions of mathematical papers?

arxiv soft-question

7h ago Neil Strickland 14k●1●29●68

3

votes

1

answer

81

views

Which real analytic functions of two variables locally are magnitudes of complex-analytic functions

cv.complex-variables

8h ago Dmitri Scheglov 83●4

2

votes

1

answer

74

views

Localisation in a quasi-category

higher-category-theory reference-request localization

8h ago Urs Schreiber 6,735●14●22

0

votes

1

answer

64

views

To what equal constant in the Gibbs lemma

game-theory mathematical-economics oc.optimization-control

8h ago Steven Landsburg 9,593●1●29●52

2

votes

1

answer

144

views

Group scheme over a DVR whose special fibre is the image of points under reduction mod p

ag.algebraic-geometry algebraic-groups

8h ago A Stasinski 1,178●6●10

3

votes

1

answer

88

views

Checking if a binary vector lies in the affine span of given binary vectors

linear-algebra algorithms computational-geometry

9h ago Allen Knutson 12.9k●1●23●64

1

vote

1

answer

144

views

Smooth map to the stack of G-bundles

stacks ag.algebraic-geometry algebraic-groups

9h ago Jason Starr 1,935●8●15

4

votes

1

answer

113

views

Is the dual of $A^1(\Omega)$ known for arbitrary domains ?

complex-analysis

9h ago MathOverflow♦ 1●2●3

1

vote

0

answers

62

views

Algorithm for Matrix Inverse in MATLAB [closed]

matrix-analysis

9h ago Nikhil Goyal 11●1

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