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Interesting 16 Bountied Hot Week Month
2 votes
1 answer
135 views

A limit of the hyperfactorial and Barnes G-function

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Claude Leibovici
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0 votes
1 answer
761 views

Sealed bid first price auction with 2 players.

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0 votes
0 answers
3 views

Finding the matrix $A$ of a projective transformation $\pi_A$

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Peter Chen
  • 129
-1 votes
0 answers
9 views

Find x in 2, 23, 10, x, 26, 331

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Val
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3 votes
5 answers
516 views

How many elements are present in the subset of a null set?

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Ali Dursun
  • 497
3 votes
4 answers
237 views

Complex logarithm base 1

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Anixx
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1 vote
0 answers
32 views

Prove that $4\int_0^1 \frac{\operatorname{Li}_2(x(1-x))}{1-x+x^2}\mathrm{d}x=\int_0^1 \frac{\ln x \ln(1-x)}{1-x+x^2}\mathrm{d}x$

Bowei Tang's user avatar
Bowei Tang
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6 votes
3 answers
412 views

If $a^4+b^4+c^4=3$ so $\sum\limits_{cyc}\frac{1}{3-2ab}\leq3$

River Li's user avatar
River Li
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1 vote
0 answers
88 views

uniqueness of fixed point using a non-linear function

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user1551
  • 151k
0 votes
0 answers
12 views

Why this word has the vertice of 2

John Lee's user avatar
John Lee
  • 17.4k
-1 votes
1 answer
20 views

prove that the torus parametrization is an injective function

Gabe's user avatar
Gabe
  • 51
1 vote
0 answers
19 views

Asymptotic expansion as $x \rightarrow \infty$ of $\sum_{n \le x} \lfloor\frac{x}{n}\rfloor \left\{{2\sqrt{\lfloor\frac{x}{n}\rfloor}}\right\}$

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Lorenz H Menke
  • 1,025
2 votes
3 answers
726 views

Does $x \propto y$ and $x \propto z$ imply $x \propto yz$ or $x^2 \propto yz$?

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ryang
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2 votes
1 answer
1k views

Proof of Burnside's theorem

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CommunityBot
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3 votes
1 answer
34 views

Chern class of tangent bundle of hypersurface of CP^n viewed as complex of coherent sheaves

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Sasha
  • 21.3k
1 vote
1 answer
33 views

Can the magnitude of a complex number have a complex number?

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Siong Thye Goh
  • 155k
0 votes
0 answers
11 views

A closed subset of $\mathbb{R}^k$ without transversal curves?

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user1234567890
  • 430
0 votes
0 answers
3 views

Proving hermite conditions of a polygonal patch

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Makogan
  • 3,857
0 votes
1 answer
27 views

Is the topological type of the polygons with the following words orientable

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Dennis
  • 2,744
1 vote
1 answer
26 views

Changing the order of integration in an iterated integral with a single varible function

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Ian
  • 71
0 votes
0 answers
18 views

How to depict a positive normal vector at boundary point of an oriented manifold

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GeometriaDifferenziale
  • 1,015
5 votes
6 answers
267 views

Find the ratio $\frac{AC}{BC}$ given a specific configuration of equilateral triangles around a right triangle (need Euclidean geometry approach)

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mezzoctane
  • 1,575
15 votes
2 answers
517 views

Conjecture: $\sum_{j=1}^J\arcsin\left(r(j)\sqrt{C(j)}\right)\neq2\pi$, for non-negative rationals $r(j)$ and distinct primes $C(j)$

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Daniele Tampieri
  • 11k
2 votes
0 answers
41 views

If $\varphi(f)$ is Riemann integrable for each $\varphi \in E^*$, then is $f$ Riemann integrable?

Duong Ngo's user avatar
Duong Ngo
  • 2,901
6 votes
1 answer
387 views
+50

Maximizing count of subsequences for 3 or more permutations.

Gabe's user avatar
Gabe
  • 51
3 votes
0 answers
32 views

Closed form for $\int_{0}^\infty e^{-ax^2}\operatorname{erf(px)}\operatorname{erf(qx)}\operatorname{erf(rx)}\operatorname{erf(sx)}\,dx$?

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Blue
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3 votes
1 answer
3k views

Determinant of Skew-Symmetric Matrices

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Zoudelong
  • 1,840
-3 votes
0 answers
49 views

Asymptotic equivalence of a binomial Sum :

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metamorphy
  • 44.3k
2 votes
1 answer
29 views

Showing order $p^3$ groups are regular for odd $p$

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kabenyuk
  • 13.1k
0 votes
1 answer
25 views

Applying Leibniz's Rule to Double Integrals with Variable Limits

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JC Q
  • 1,868
5 votes
1 answer
1k views

Hitting time of Brownian motion against a square root curve

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  • 1
0 votes
0 answers
13 views

Term for bivariate homogeneous tensor

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Reinderien
  • 216
3 votes
2 answers
106 views

Compute $\int\left(5\cos^3(t)-6\cos^4(t)+5\cos^5(t)-12\cos^6(t)\right)\,\mathrm{d}t$ using some results in Linear Algebra

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Hazem Orabi
  • 5,242
1 vote
1 answer
18 views

The set $\mathcal{S}(R)$ of all radical ideals of a ring $R$ might form a boolean ring with $\circ=$ ideal addition and $\oplus=$ a certain quotient.

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Alex Kruckman
  • 88.9k
1 vote
0 answers
61 views

Tricks for Computing the Center of a Group

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Vincent Tran
  • 359
0 votes
1 answer
35 views

What is the probability that a bus will skip the first stop?

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Ross Millikan
  • 384k
1 vote
1 answer
55 views

Possible arrangements for any n number of distinct cubes

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Zaim Ipek
  • 11
1 vote
1 answer
762 views

Specific examples of an increasing and decreasing function

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202 votes
0 answers
6k views
+50

Sorting of prime gaps

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Alex Ravsky
  • 108k
2 votes
1 answer
50 views

Random Distribution between urns

Henry's user avatar
Henry
  • 172k
4 votes
3 answers
683 views

On the proof of Buckingham π theorem

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Moishe Kohan
  • 113k
3 votes
4 answers
236 views

How to find the maximum length of chord cut by a right angle inside a circle

Li Kwok Keung's user avatar
Li Kwok Keung
  • 5,408
0 votes
0 answers
8 views

Conditions for a Fourier-windowed quadratic form to define a finite-range or exponentially decaying interaction?

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Creator
  • 3,228
3 votes
1 answer
896 views

Multinomial Distribution to Binomial Distribution and Joint Probability Function

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  • 1
1 vote
0 answers
15 views

Restrictions of Knight's Tour on Circular Board

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jkmosu
  • 11
5 votes
4 answers
330 views

If $a^2+b^2+c^2=1$ so $\sum\limits_{cyc}\frac{1}{(1-ab)^2}\leq\frac{27}{4}$

River Li's user avatar
River Li
  • 51.4k
1 vote
1 answer
31 views

Any 'locally butterfly' graph be constructed as line graph from a 3-regular, triangle-free graph: Can this be generalized to locally windmill graphs?

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Misha Lavrov
  • 162k
5 votes
1 answer
105 views

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

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Will Jagy
  • 147k
1 vote
1 answer
1k views

Solving $\sin(x) + \sin\left(2^{(n+12)/12}x\right) = \sin(x+w) + \sin\left(2^{(n+12)/12}(x+w)\right)$ for $w$

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CommunityBot
  • 1
2 votes
1 answer
53 views

Simplify expression for lemniscate tangent function

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Blue
  • 85.3k
1 vote
1 answer
803 views

Jensen inequality for concave functions

RobPratt's user avatar
RobPratt
  • 52.5k
2 votes
1 answer
97 views

Reversibility of a random walk

John Dawkins's user avatar
John Dawkins
  • 30.3k
2 votes
1 answer
757 views

Element with maximum magnitude in $A \leq \max(\sigma_{i})$, where $\sigma_{i}$ is singular values of A

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CommunityBot
  • 1
0 votes
0 answers
17 views

Seeking resources about multiple directed acyclic graphs/topological orderings

Rocco's user avatar
Rocco
  • 1
2 votes
1 answer
142 views

Is my understanding correct about the inverse relationship between derivatives and integrals?

Jean Marie's user avatar
Jean Marie
  • 90.8k
0 votes
0 answers
114 views

Why do vectors behave as derivation on functions

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basile plus
  • 21
1 vote
1 answer
790 views

Number Plate Problem

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CommunityBot
  • 1
5 votes
1 answer
198 views

Generalization of Schwarz's Lemma

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David Goldberg
  • 514
2 votes
2 answers
200 views

Maximum Travelling Salesman Problem on the integer line

tkf's user avatar
tkf
  • 15.5k
3 votes
0 answers
59 views

Definition of hyperprojective sets

n901's user avatar
n901
  • 749
3 votes
0 answers
308 views

Is the Imaginary Golden Ratio Unique?

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Cye Waldman
  • 8,314
0 votes
0 answers
52 views

Central Limit Theorem via Fixed Point Theorem and Entropy

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inkievoyd
  • 1,987
1 vote
2 answers
162 views

Prove that the iterate $f^{n}$ is a constant function.

PunkZebra's user avatar
PunkZebra
  • 1,799
3 votes
1 answer
768 views

Convergence in norm independent of the choice of the norm.

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CommunityBot
  • 1
2 votes
1 answer
569 views

Choosing distinct balls to put into identical urns.

Henry's user avatar
Henry
  • 172k
3 votes
1 answer
72 views

Invariant trees of outer automorphism of free groups

Lee Mosher's user avatar
Lee Mosher
  • 138k
0 votes
2 answers
774 views

Does $Ax=b$ have a solution for every vector $b$ in $\mathbb{R}^3$

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CommunityBot
  • 1
4 votes
1 answer
147 views

Book Recommendation for Vector Bundles

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Man-I-Fold
  • 257
0 votes
1 answer
28 views

Decomposition of von Neumann algebra in semi-finite and purely infinite part

David Gao's user avatar
David Gao
  • 25.8k
3 votes
1 answer
63 views

Does there exist a prime decomposition for every possible combination of ramification and inertia degree

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dummy
  • 994
1 vote
0 answers
95 views

Is the proposition $P$ equivalent to the axiom of regularity

Tankut Beygu's user avatar
Tankut Beygu
  • 4,926
1 vote
1 answer
90 views

Why don’t textbooks mention the 2-dimensional metric completion model of $S^2$?

Lee Mosher's user avatar
Lee Mosher
  • 138k
0 votes
0 answers
37 views

Probabilistic behavior of Carmichael numbers

AAQU's user avatar
AAQU
  • 21
2 votes
1 answer
258 views

Symmetric product of projective planes

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secretGarden
  • 181
14 votes
2 answers
620 views

Confusion about differentials

Toby Bartels's user avatar
Toby Bartels
  • 5,109
0 votes
0 answers
16 views

isometry group of an orbifold is the quotient of the isometry group of its cover

Linda Green's user avatar
Linda Green
  • 11
0 votes
0 answers
74 views

Proof of Euler identity using ODE

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M.B
  • 58
2 votes
0 answers
58 views

The Intuition behind the nim game and the XOR?

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Thomas Andrews
  • 188k
7 votes
1 answer
761 views

Relative effective Cartier divisors

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CommunityBot
  • 1
1 vote
0 answers
30 views

Any easier ways to prove an explicit form for a generated $\sigma$-algebra besides transfinite induction?

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hasManyStupidQuestions
  • 1,716
15 votes
0 answers
416 views
+100

Determining whether $A\subset X = \left\{0,1,\ldots,n\right\}$ can be written as $A=B+C$

RobPratt's user avatar
RobPratt
  • 52.5k
1 vote
0 answers
43 views

Does each partial derivative vanish on the path from a local to a global minimum?

Paul Frost's user avatar
Paul Frost
  • 92.3k
0 votes
3 answers
768 views

Prove linearity of map involving dual space

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3 votes
0 answers
102 views

Number of integer solutions to $\sum_{i=1}^{10} x_i = 100$ with $2 \le x_i \le 21$

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thedeepdeepsky
  • 1
2 votes
0 answers
43 views

Area estimate of the intersection of ball and sphere

Alessandro's user avatar
Alessandro
  • 666
0 votes
1 answer
83 views

Maximisation of functions of the form $f(x) = \sqrt{1 - x^2} + (ax+b)x$

Pooya's user avatar
Pooya
  • 246
0 votes
0 answers
96 views

Getting different answers for integration problem: $\int_0^2 x d( \{x\} )$

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thedeepdeepsky
  • 1
1 vote
0 answers
66 views

Quotient of $\mathrm{GL}_2(\mathbb{C})$ by a finite group

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secretGarden
  • 181
1 vote
1 answer
229 views

Does "the preimage of a closed interval is a finite union of closed intervals" imply $f:\mathbb{R}\to\mathbb{R}$ is continuous?

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N. Virgo
  • 7,992
8 votes
4 answers
525 views

Dummy variable rule for indefinite integrals?

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invictus
  • 101
0 votes
0 answers
17 views

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

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Rodrigo de Azevedo
  • 23.6k
5 votes
1 answer
4k views

Does $\mathcal P(A \cap B) = \mathcal P(A) \cap \mathcal P(B)$ hold? How to prove it?

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Emil Jeřábek
  • 2,996
-1 votes
1 answer
260 views

Distributive law on right in ordinals

Ali Dursun's user avatar
Ali Dursun
  • 497
2 votes
1 answer
203 views

Fiber dimension of finitely presented dominant morphisms of irreducible schemes

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Dhruv Goel
  • 138
2 votes
1 answer
90 views

Demonstration Written in Formal Language

Tankut Beygu's user avatar
Tankut Beygu
  • 4,926
4 votes
1 answer
217 views

Any upper bound for $\sum_{i=1}^{n} v_i^\mathsf{T} \left( \left( \alpha I + \sum_{k=1}^{i} v_k v_k^\mathsf{T} \right)^{-1} \right)^{2} v_i$?

WuMing WuXing's user avatar
WuMing WuXing
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