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Interesting 47 Bountied Hot Week Month
1 vote
1 answer
2 views

Is there a minimal structure in a finite signature with this property?

Alex Kruckman
  • 64k
0 votes
0 answers
13 views

Why is it the case that $|z-\alpha|\leq n\left|\frac{p(z)}{p'(z)}\right|$ for a polynomial $p$ of degree $n$ with root $\alpha$?

Kyky
  • 2,709
0 votes
0 answers
4 views

Understanding tensor fields in coordinates

didiegop
  • 543
0 votes
1 answer
21 views

Solution of Quasi Polynomial $x=-a-\frac{a}{2}e^{-3x}-ae^{-2x}-\frac{3a}{2}e^{-x}$

IV_
  • 4,601
2 votes
2 answers
100 views

numerically solving a system of multivariate polynomials

AmirHosein Sadeghimanesh
  • 3,690
1 vote
1 answer
14 views

Hessian of a function on a Riemannian manifold.

Didier
  • 11.3k
0 votes
0 answers
3 views

Correctness of direct numerical solution of ill-conditioned linear system

Fidel Pestrukhine
  • 1
0 votes
0 answers
5 views

Find the value of $(\sqrt{-x}+\sqrt{y})^{-2024}$

Everyone says FU
  • 487
0 votes
0 answers
4 views

Work by vector field along curve of intersection between sphere and plane

flipster
  • 1
0 votes
1 answer
6 views

Finding the area of the region cut from the first quadrant by the curve

gt6989b
  • 53k
1 vote
1 answer
29 views

Isomorphism between finite fields with polynomials $a^2 + 1$ and $b^2 + b + 2$

Acrobatic
  • 171
-3 votes
0 answers
23 views

Norm in $ (L^2(\Bbb C),dz)$

Anne Bauval
  • 3,233
1 vote
0 answers
22 views

Geometry - Solve a system using Wolfram Alpha

KReiser
  • 52.7k
0 votes
0 answers
5 views

integral with hyperspherical coordinates?

DLM
  • 1
0 votes
0 answers
9 views

Bounds for Chebyshev polynomials outside [-1,1]

tch
  • 1,330
1 vote
0 answers
20 views

Minimal irrep of $ PSL(2,p) $

Ian Gershon Teixeira
  • 4,138
1 vote
1 answer
26 views

Conditions under which induced $\mathcal{L}_2$ system gain is equal to induced $\mathcal{L}_\infty$ system gain

KBS
  • 4,465
0 votes
0 answers
3 views

Trying to figure out Sgn function values

ASJQ
  • 1
1 vote
0 answers
12 views

Are the positive rationals definable from the rationals with multiplication?

user107952
  • 14.4k
0 votes
0 answers
6 views

How to compute 3D ellipsoid transformation from three 2D orthographic projections?

Jib
  • 1
0 votes
0 answers
7 views

Asymptotic behavior of an infinite product

MathKid
  • 79
0 votes
0 answers
12 views

limit $\frac{\sqrt{t_n^2+1}-\sqrt{s_n^2+1}}{t_n-s_n}$ as $t_n-s_n \to + \infty$, where $t_n > s_n, \forall n.$

P.G
  • 624
0 votes
0 answers
16 views

Find the number of $7$-element subsets $\{a,b,c,d,e,f,g\}$ of $\{1,\cdots,14\}$ such that $7 \mid (a+ b+c+d+e+f+g)$

Young
  • 5,258
0 votes
0 answers
4 views

Finding a special Carmichael number

zhrd
  • 1
0 votes
0 answers
9 views

Combinatorial problem related to Jordan Canonical Form

Lee
  • 1,797
0 votes
0 answers
12 views

Group of 8 people

N. F. Taussig
  • 68.2k
0 votes
0 answers
7 views

Why does Dirac's delta distribution have an infinite energy?

Cartesian Bear
  • 457
4 votes
1 answer
76 views

Is the quadratic formula called Bhaskara Formula in any other country beyond Brazil?

bluemaster
  • 4,040
2 votes
0 answers
10 views

Reference request for class field theory in arithmetic geometry

Zhibin
  • 21
0 votes
1 answer
19 views

$\sum{z^n\over (n!)^\alpha}$ is an entire function of order $1/\alpha$

reuns
  • 70.4k
0 votes
0 answers
2 views

Derivative of joint density function of Mutual Information using Partial Volume estimation

user3717843
  • 1
1 vote
0 answers
19 views

Maximum number of distinct elements in matrix of size $p \times p$, given for any row/column, there are $\le p-1$ distinct elements.

EnEm
  • 387
0 votes
1 answer
29 views

Is $R$ an equivalence relation or not?

Rodrigo de Azevedo
  • 19.4k
1 vote
1 answer
376 views

Haar measure on SU(n)

Mogget
  • 394
0 votes
0 answers
21 views

Optimization of an inner product with respect to an operator

dallla
  • 33
0 votes
1 answer
20 views

Existence of Perfect subset for any given measure

Yanko
  • 12.2k
0 votes
1 answer
21 views

Calculating total intersection in a probability space from smaller intersections

chrslg
  • 156
0 votes
0 answers
5 views

How to find the maximum value of the function f(x,y,z) with the condition.

WalrusYT
  • 11
0 votes
0 answers
15 views

Equivalence between constants and 0-ary functions

Mauro ALLEGRANZA
  • 89.9k
1 vote
1 answer
10 views

To give some example where $x_n\rightarrow x$, $y_n\rightarrow y$ weakly but $(\langle x_n, y_n\rangle)_{n}$ is not convergent:

Salcio
  • 2,001
6 votes
2 answers
78 views

If $f$ is bounded and has bounded derivative on $\mathbb{R}$, then $xf(x)\in L^1\Rightarrow xf(x)\in L^\infty$?

Oliver Díaz
  • 27.7k
1 vote
0 answers
5 views

What would be the fundamental period of this discrete-time signal?

Caporal Fourrier
  • 356
1 vote
0 answers
18 views

How is the multidimensional Lagrangian-function partially derived here? Chain-Rule and?

Paul Frost
  • 61.1k
0 votes
0 answers
9 views

How do you find the solutions to the vector field $W(x,y,z)?$

geocalc33
  • 420
0 votes
0 answers
14 views

Is there a solution of this equation involving rational powers?

Kuba hasn't forgotten Monica
  • 916
1 vote
0 answers
21 views

Eigenvectors spanning closed subspace in a Banach space

Ariana
  • 708
3 votes
1 answer
998 views

Fokker Planck and SDE

CommunityBot
  • 1
1 vote
1 answer
25 views

Tips to know what to condition on in probability: Win by Two

true blue anil
  • 31.5k
0 votes
0 answers
18 views

Distribution of 2A , 2B and 2C in three identical box..

N. F. Taussig
  • 68.2k
0 votes
0 answers
45 views

Given three real numbers $c_1,c_2,c_3$, how to construct a monotonic sequence $\{a_n\}\to\infty$?

Jean-Armand Moroni
  • 2,407
2 votes
1 answer
24 views

Sheaf of sections supported at a point is coherent?

Sisi
  • 1,275
-2 votes
0 answers
17 views

Need help translating a word problem

bittscoterie
  • 7
0 votes
0 answers
9 views

About Leray-Schauder fixed point theorem’s application in PDE

David
  • 91
4 votes
1 answer
23 views

Answer verification regarding fundamental period.

Ahson Yousef
  • 367
0 votes
0 answers
19 views

Triangle inequality on nearest integer function

Bill Dubuque
  • 260k
0 votes
0 answers
4 views

Equivalent estimators and transformation of joint density

James
  • 372
0 votes
0 answers
8 views

Possible Tetration extension for a specific interval (part 2)

Pierre Carlier
  • 71
0 votes
0 answers
17 views

Is my proof (that the summit angles of a Saccheri quadrilateral are congruent) valid?

math4
  • 147
5 votes
1 answer
67 views

What makes Cousin's theorem remarkable?

Alexey
  • 1,708
6 votes
1 answer
212 views
+100

Limit of Exponential and its Integral

Matija
  • 166
0 votes
1 answer
15 views

Problem with the minimum distribution of a set of iid random variables

md2perpe
  • 23.2k
1 vote
1 answer
30 views

Uniform distribution on the triangle $ ∆:=\left \{ (x, y) ∈ R^2|0 < x, y < 1, x + y < 1 \right \}$

md2perpe
  • 23.2k
0 votes
0 answers
23 views

Find the 'square' divisors of a given even number

Hasen
  • 121
0 votes
0 answers
8 views

How to infer that $\|T\| \leq \sqrt{B}$ from the fact that $\left\{f_k\right\}_{k=1}^{\infty}$ is a Bessel sequence ($T$ is the pre-frame operator)?

Mark
  • 7,358
-1 votes
0 answers
11 views

how to use implicit function theorem on $F(x,y)=x-f(y)$

Eod Enaj
  • 149
0 votes
1 answer
36 views

Use neighborhood signs to express e, pi, phi

Jam
  • 8,522
0 votes
0 answers
17 views

Set of elements outside range space

tommy lim
  • 1
0 votes
0 answers
23 views

Prove that if the sets $A, B, C$ are all measurable, then $m(A \cup B \cup C)=m(A)+m(B)+m(C)-m(A \cap B)-m(A \cap C)-m(B \cap C)+m(A \cap B \cap C)$

JD Maximo
  • 1
0 votes
0 answers
16 views

Proof of theorem involving incircles

Divyansh Arora
  • 1
0 votes
0 answers
11 views

References regards complex analysis on Banach spaces

alans
  • 6,291
2 votes
0 answers
31 views

Place rectangles minimizing unused space

digory doo
  • 121
0 votes
0 answers
9 views

Radius of curvature at a point on a Lorentzian manifold

Tobias
  • 1
0 votes
0 answers
14 views

Regarding Invariants

samir ahmad
  • 1
0 votes
0 answers
9 views

A step in real analysis lemma used in Moser Trudinger proof

User11111
  • 121
2 votes
1 answer
11 views

How can I check that $\Bbb{E}(X_n1_{B_n})<\epsilon$ if $B_n=\{\Bbb{E}(X_n|F_n)\leq\epsilon\}$?

Davide Giraudo
  • 161k
3 votes
1 answer
36 views

If $[G:H]=p$ is a prime. If there is an element $g\notin H$ satisfies $gH=Hg$, then $H$ is a normal subgroup of $G$

Shaun
  • 40.3k
0 votes
0 answers
25 views

Prove $\int_{0}^{+\infty} \frac{\exp(-t)}{\sqrt{\pi t}} \exp (-\frac{x^2}{4t}) ~\mathrm{d} t = e^{-|x|}$

曾靖國
  • 695
1 vote
1 answer
15 views

modular automorphism group for a faithful normal state restricted to a von Neumann subalgebra

Martin Argerami
  • 184k
0 votes
0 answers
15 views

Exercise 7, Section 5.3 of Hoffman’s Linear Algebra

user264745
  • 2,172
1 vote
0 answers
9 views

The number of $C^0$ conjugacy classes of a $C^1$ flow in $\mathbb R$

Marco Polo
  • 138
2 votes
0 answers
19 views

Computing the global and Hochschild dimensions of a free product of direct products of fields.

Sergey Guminov
  • 2,889
6 votes
2 answers
38 views

Old Maid Card Game Probability Question

user2661923
  • 26.1k
1 vote
0 answers
18 views

Example of a brick-infinite, tame, triangular algebra of global dimension$\geq3$

FreePawn
  • 669
0 votes
0 answers
13 views

Left multiplying matrices that are invertible

zedyjy
  • 1
0 votes
0 answers
20 views

Limit of two variables (apparently $+\infty$)

UlyssesJA
  • 155
0 votes
1 answer
25 views

What is the name of the algorithm, or area of maths that divides a plane around a number of points.

vvg
  • 1,196
1 vote
0 answers
27 views

Proof of the inequality $\sup_{x\in [a, b]} (f(x)) ^2 \le (b-a) \int_a ^b(f'(x)) ^2 dx$

Anne Bauval
  • 3,233
6 votes
2 answers
173 views

Shortest path between two points via two disks

HK Lee
  • 18.7k
0 votes
0 answers
16 views

ellipsoid equation of intersection of a cone and a hyperplane

KReiser
  • 52.7k
1 vote
0 answers
23 views

Minimum possible sum of the weights of the heaviest kid and the second heaviest kid

InanimateBeing
  • 2,163
2 votes
0 answers
63 views

Propagators and PDEs

Bettina
  • 29
0 votes
0 answers
17 views

Can I solve this quadratic program "fast"?

reservoir
  • 47
3 votes
1 answer
32 views

Converting the double integral in polar coordinates to Cartesian coordinates

Bob Dobbs
  • 1,393
3 votes
2 answers
87 views

About the Set of $\mathbb{S}=\{ n | n = a^2+b^2, a, b \in \mathbb{Z}. \}$

RDK
  • 2,011
3 votes
3 answers
2k views

Probability/Combinatorics Problem - Old Maid Cards

user1102277
  • 71
0 votes
2 answers
46 views

Real Analysis - Sequence Convergence

FShrike
  • 14.1k
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