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Interesting 13 Bountied Hot Week Month
2 votes
1 answer
13 views

Prove $\int_0^af(x)\mathrm dx\ge a\int_0^1f(x)\mathrm dx$

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Martin R
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3 votes
2 answers
141 views

Cozero complemented property for a space and its Tychonoff reflection

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PatrickR
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4 votes
2 answers
1k views

Prove that $\mathbb{Q}(\sqrt{2+\sqrt{2}}) / \mathbb{Q}$ is a normal extension

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Paramanand Singh♦
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2 votes
1 answer
55 views

What $a,b$ such that $\sum\limits_{n\ge 1}\frac{x^b}{n(1+n|x|^a)}$ converge uniformly on $\mathbb{R}$.

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Claude Leibovici
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0 votes
0 answers
10 views

I.N.Herstein "Topics in algebra" Sec. 1.1 The Set theory

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Bowei Tang
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0 votes
2 answers
134 views

Algorithm to determine if primes are Emirps

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Peter El Ghazal
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-2 votes
0 answers
17 views

Divergence Test

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Bowei Tang
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0 votes
0 answers
3 views

Preimage of curves in a double cover of surface

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Zoe
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3 votes
1 answer
43 views
+50

Is a collinearity step missing in this Miquel point proof?

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mathlove
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0 votes
1 answer
180 views

Computing Galois group of $\mathbb Q(\sqrt2,\sqrt3,\sqrt{(9-5\sqrt3)(2-\sqrt2)})$

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DroneBetter
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0 votes
0 answers
8 views

Is it valid to compare solving vs checking NP problems using average time per logical step?

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Bill Dubuque
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1 vote
2 answers
773 views

Fourier transform of a function with exponential and powers

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0 votes
0 answers
11 views

Does definition of empty set use universal specification

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VizDracViz
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2 votes
4 answers
225 views

Calculate $\lim_{t\to\frac{\pi^-}{2}} \int_0^t (\cos x)\ln(\cos x) \, \mathrm dx$

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Claude Leibovici
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0 votes
1 answer
70 views

Can every $\sigma \in \operatorname{Hom}_F(E,L)$ be extended to a $\sigma' \in \operatorname{Hom}_F(L,L)$

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DroneBetter
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0 votes
0 answers
8 views

How the energy-momentum tensor comes from the action in kalb-ramond gravity?

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Skj
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0 votes
1 answer
127 views

Demonstrating a bijection between a Banach algebra and its Gelfand representation

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DroneBetter
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0 answers
11 views

How proof of the Chain Rule for a composite function z=f(u(x,y),v(x,y))

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Nhut Phung
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0 votes
0 answers
253 views

Expected value of sum of order statistics

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DroneBetter
  • 670
1 vote
1 answer
29 views

Do places ever become inert in the Hermitian function field over $\mathbb{F}_4$ ($q = 2$)?

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Jyrki Lahtonen
  • 143k
1 vote
0 answers
15 views

Class group of $\mathbb{Q}(\sqrt[3]{3})$

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Plantation
  • 4,072
1 vote
1 answer
2k views

Spherical Harmonic Derivative

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0 votes
0 answers
760 views

How to compute homology group of $S^1 \times S^n$

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DroneBetter
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0 votes
1 answer
391 views

How to prove $\mathrm{Gal}(K/LM)=\mathrm{Gal}(K/L) \cap \mathrm{Gal}(K/M)$

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DroneBetter
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4 votes
0 answers
43 views

Quintic residues and $p=x^2+125y^2$

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mezzoctane
  • 1,553
12 votes
0 answers
147 views

Existence of finite non-associative fields

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Super Cool Guy
  • 403
3 votes
1 answer
99 views

Number of real roots of the n-th iteration of $f(x) = x^3 - 3x + 1$

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T﹏T
  • 3,453
2 votes
0 answers
22 views

The set of numbers in which iterating a tent map remains bounded

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Mark McCallum
  • 61
0 votes
0 answers
16 views

preimage of an interval overlap under multiplication

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Bill Dubuque
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0 votes
0 answers
48 views

Function fields over finite field.

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Math123
  • 1,273
0 votes
0 answers
15 views

How to plot harmonic vector fields on a genus-2 surface?

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hbghlyj
  • 6,057
4 votes
4 answers
436 views

What sets of digits can be used to represent all of the real numbers in a ternary numeral system?

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Dark Malthorp
  • 8,706
0 votes
0 answers
45 views
+50

What is the most concise complete definition of a rigid framework?

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Nate
  • 263
1 vote
1 answer
2k views

Sketching the contour map of a function with several variables

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CommunityBot
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200 votes
1 answer
6k views
+50

Sorting of prime gaps

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0 votes
0 answers
20 views

Spectral measure associated with "translation by $z$" operator acting on $L^2(\mathbb{R})$

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tyzz
  • 64
6 votes
1 answer
266 views

Exercise in Mathematical Logic by Ebbinghaus

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John Lee
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2 votes
2 answers
49 views

Blind Spot Regarding the Correlation Coefficient

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Snoop
  • 19.1k
5 votes
0 answers
104 views

Maximizing a function with infinitely many parameters

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UnchangedColloquialism9
  • 1
4 votes
1 answer
282 views

Balls and Bins Variant Unique Maximum Number of Balls in a Bin

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Henry
  • 172k
1 vote
1 answer
49 views

Invariant trees of outer automorphism of free groups

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Lee Mosher
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6 votes
2 answers
863 views

Generalising Riemann integral to functions with values in a Banach space

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CommunityBot
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1 vote
1 answer
304 views

number of $n$-permutations with $2$ cycles ${n\brack 2}$

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DroneBetter
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4 votes
0 answers
96 views

On $\iint_0^\infty\frac{x^{s-1}\,y^{-s}}{e^{x+y}+1}\frac{dxdy}{\cosh{x}}$

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Hazem Orabi
  • 5,222
0 votes
1 answer
767 views

Poisson process: nth jump from expectation of interarrival time

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CommunityBot
  • 1
2 votes
1 answer
44 views

Size of family of pairs of edges overlapping at exactly 1 vertex in a non two colorable hypergraph

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  • 1
0 votes
1 answer
51 views

A “block” generalization of factorions

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mezzoctane
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0 votes
1 answer
65 views

Descend constant vector fields on Euclidean $4g$-gon via opposite-side identification to vector fields with only one singularity on genus-$g$ surface

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hbghlyj
  • 6,057
4 votes
1 answer
2k views

Holder inequality is equality for $p =1$ and $q=\infty$

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2 votes
1 answer
35 views

Construct AM–GM Proofs of Muirhead Inequalities (From Majorization to Explicit Weighted AM–GM Chains)

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hbghlyj
  • 6,057
11 votes
1 answer
308 views

Help with $\int_{0}^{\pi /4} x^3 (\sqrt{\tan (x)} + \sqrt{\cot (x)}) dx$

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Dr. Wolfgang Hintze
  • 13.5k
3 votes
1 answer
930 views

Curvature and adjoint bundle

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CommunityBot
  • 1
1 vote
2 answers
103 views

What is the measure of the angle between the two diagonals of this trapezoid?

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Intelligenti pauca
  • 56.8k
5 votes
2 answers
3k views

Sum of powers mod p

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Kan't
  • 5,601
0 votes
1 answer
49 views

Relative compact set in metric space

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freakish
  • 47.7k
0 votes
1 answer
54 views

A question about the formal definition of a function graph.

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jjagmath
  • 24.7k
0 votes
1 answer
787 views

Exercise 2.5.8 Durrett's book

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CommunityBot
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0 votes
0 answers
79 views

Continuous functional calculus (Modify the abuse of notations)

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Andrew_Ren
  • 1,299
13 votes
1 answer
1k views

Geometrical interpretation of cup product

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Peter Phipps
  • 3,110
0 votes
0 answers
24 views

Defining a 2D TQFT that maps $S^1$ to the vector space of of all $n×n$ matrices over $\Bbbk$.

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antizanzare
  • 1
2 votes
1 answer
120 views

Convergence of a Zeta-Zeta function

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Pooria Hassanpour
  • 1
3 votes
1 answer
71 views

Murphy's Theorem 3.3.2 on positive linear functionals

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Alec Gow
  • 128
7 votes
2 answers
693 views

Problem evaluating a contour integral using parametrization

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José Carlos Santos
  • 443k
0 votes
2 answers
770 views

Calculate asymptotic upper bound for a function

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CommunityBot
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2 votes
0 answers
47 views

Which permutations Galois considered out of $n!$ permutations in $S_n$ to prove insolvability of quintic polynomial?

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Learner
  • 574
7 votes
1 answer
99 views

Deconvolution question

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Srini
  • 2,365
1 vote
0 answers
24 views

Expected number of lattice points in a randomly inscribed triangle

Maxime Jaccon's user avatar
Maxime Jaccon
  • 5,299
1 vote
1 answer
236 views

Distributive law on right in ordinals

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Ali Dursun
  • 495
0 votes
2 answers
1k views

Variance of Maximum Likelihood Estimator

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CommunityBot
  • 1
2 votes
1 answer
83 views

Simplex Method - How to know which basis to choose after the first iteration?

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RobPratt
  • 52.5k
3 votes
0 answers
89 views

Hironaka’s polyhedron.

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Ted Shifrin
  • 128k
2 votes
1 answer
75 views

Is there a dense set of Lipschitz functions on the unit ball which all peak at the same point on the boundary?

Elena Reyner's user avatar
Elena Reyner
  • 1
0 votes
0 answers
41 views

How to define a directed path in any space?

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kaba
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1 vote
1 answer
123 views

Confusion about the proof method of Lemma 2.16 in Mendelson

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Tankut Beygu
  • 4,916
0 votes
0 answers
26 views

Is Exact Matching with more than two colours NP-hard?

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J. Schmidt
  • 353
4 votes
2 answers
169 views

Multiplication of surreal ordinals

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ViHdzP
  • 4,942
2 votes
0 answers
85 views

Creative Alternatives to Vieta's formulas/Newton's identities

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Maxime Jaccon
  • 5,299
2 votes
0 answers
36 views

On the definition of a Monoidal Category

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Luna Elliott
  • 233
1 vote
0 answers
67 views

Using the dominated convergence theorem with nets

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user124910
  • 3,355
0 votes
0 answers
6 views

How to represent a standard linear program (LP) as a semidefinite program (SDP)?

Ben Shaines's user avatar
Ben Shaines
  • 241
0 votes
0 answers
11 views

Sufficient condition at infinity for uniqueness of a non-linear parabolic PDE

Falcon's user avatar
Falcon
  • 4,536
0 votes
0 answers
37 views

A conjecture on representing composite Fibonacci numbers

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J. W. Tanner
  • 64.6k
2 votes
0 answers
22 views

Number of multisets of n positive integers with equal sum and product

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BomingY
  • 21
2 votes
0 answers
163 views

Finding all monic polynomials $P(x)$ such that $P(x+1)\mid P(x)^{2}-1$

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Blue
  • 85.3k
1 vote
0 answers
31 views

Covariance of Unbiased Sample Variance Estimators with Overlapping Samples

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mathematurgist
  • 53
3 votes
0 answers
82 views

Showing $\int_0^a\left(f(x)-\frac12x\right)^2dx\leq\frac1{12}a^3$ for $f(x)\geq0$ satisfying $\left(\int_0^tf(x)dx\right)^2\geq\int_0^tf^3(x)dx$

Blue's user avatar
Blue
  • 85.3k
3 votes
0 answers
66 views

A super-exponential sequence related to the Fibonacci sequence

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Augusto Santi
  • 3,032
3 votes
2 answers
184 views

Elliptic Constructibility of the Heptagon

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Oscar Lanzi
  • 51.2k
8 votes
1 answer
426 views

How to evaluate $\int\limits_{0}^{\frac{\pi}{2}}x^3(\sqrt{\tan x}-\sqrt{\cot x}) dx$?

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Mariusz Iwaniuk
  • 6,803
49 votes
18 answers
9k views

Interesting but short math papers?

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K.defaoite
  • 14.4k
1 vote
0 answers
17 views

Upper bound on the intersection of two radius-$r$ Hamming balls in binary constant-weight codes when codewords are at Hamming distance 2

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zchan
  • 11
0 votes
1 answer
774 views

Coefficients of a closed-loop characteristic equation

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CommunityBot
  • 1
22 votes
0 answers
711 views

Strategy for board game 2

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Mayuresh Nayak
  • 1
0 votes
2 answers
1k views

Probability Distributions (Tree Diagram)

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ramzi abdule
  • 1
0 votes
1 answer
22 views

Explicit free-group automorphism between the "palindromic" relator and the standard surface relator

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hbghlyj
  • 6,057
5 votes
1 answer
201 views

Norm of the Sobolev extension operator from a union of intervals to $\mathbb{R}$.

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Lee
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