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Interesting 41 Bountied Hot Week Month
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0 answers
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green theorem on polar closed curve C application.

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1 answer
28 views

How to solve the following 1D second order ODE for y(x)?

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JJacquelin
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1 answer
9 views

Spectrum of a bounded Hilbert operator

Chad K's user avatar
Chad K
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5 votes
1 answer
4k views

Prove that if $f:D\to D$ is analytic and has two distinct fixed points, then $f$ is the identity

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Lucius Aelius Seianus
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0 answers
2 views

Cardinality of Infinite Sets in a Cartesian Product

Edward Cheung's user avatar
Edward Cheung
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1 answer
66 views

closed but not exact form on $\Bbb{R}^n \setminus \{0\}$.

Toffomat's user avatar
Toffomat
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0 answers
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Brezis' exercise 8.28.6: how to prove that $\cos \left ( \frac{1}{\sqrt \lambda} \right ) =0$ implies $\lambda$ is an eigenvalue of $T$?

Akira's user avatar
Akira
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0 answers
6 views

Real Analysis - discontinuity

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Vinny Aleksandrov
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0 answers
3 views

Confusing about calculating a value with Fourier complex inversion formula

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Cunyi Nan
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1 answer
10 views

Expectation of a martingale on a countable index set at stopping time

James Martin's user avatar
James Martin
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0 answers
8 views

An equality between infinite products

Davide Morgante's user avatar
Davide Morgante
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0 votes
1 answer
33 views

How to calculate the area covered by a parametrized curve of a given thickness?

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Tobias Kienzler
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0 answers
7 views

Surface of 5-sided pyramid

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Henrik supports the community
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0 answers
4 views

How could I formalize this field extensions problem?

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Luismi
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2 votes
1 answer
39 views

Show that$\langle f_n\rangle$ is Uniformly Cauchy on $[1,\infty)$, where $f_n(x) = \sum_{k=0}^{n}\frac{(\ln{x})^k}{k!xe^x}$

Martin R's user avatar
Martin R
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0 answers
67 views

Definition of linear and renaming substitution

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TylerD007
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0 answers
23 views

Dirac distribution representation as a finite sequence of compactly-supported everywhere-defined functions

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Marko Stojovic
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0 answers
7 views

What is the order of set Q on A?

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NANDINI BANKA
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1 answer
17 views

$\eta$-completed and $\eta$-inverted $KGL$

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Vincent Boelens
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-2 votes
0 answers
81 views

$\min_{\boldsymbol{x}}\ \boldsymbol{x}^TB\boldsymbol{x}$ such that $\boldsymbol{x}^TA\boldsymbol{x} \leq 1$

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Another User
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-2 votes
0 answers
27 views

Proof by Mathematical induction for sequence

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B G
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0 answers
7 views

On the Killing splitting of some algebras

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Oussama Abdelghafour
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7 views

Analytical proof of expected value of a geometric discrete distribution

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fgrieu
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0 answers
10 views

Tensor product distributes over coproducts

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mNugget
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1 answer
19 views

Area of a portion of annulus

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insipidintegrator
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2 votes
1 answer
23 views

Question on the Gateaux derivative (being the principal part of a system of PDEs)

daw's user avatar
daw
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0 votes
1 answer
44 views

Integral over ellipsoid

Kurt G.'s user avatar
Kurt G.
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1 answer
41 views

Quick question on a sequence of differentiable convex function.

Zim's user avatar
Zim
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1 vote
2 answers
92 views

a,b,c>0 and prove $\frac{a}{a+\sqrt{(a+2b)(a+2c)}}+\frac{b}{b+\sqrt{(b+2a)(b+2c)}}+\frac{c}{c+\sqrt{(c+2b)(c+2a)}}\le \frac{3}{4}.$

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TATA box
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1 vote
0 answers
27 views

Constructing a bijection between $\mathbb{N}^2$ and $\{(x, y) \in \mathbb{N}^2: x \geq y\}$

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Edward Cheung
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-1 votes
0 answers
26 views

Finding maximum relative and abustle computation error of a function.

M A 82's user avatar
M A 82
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0 votes
0 answers
13 views

A Diophantine equation centered around the divisor counting function and squares

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A Neutrino Boy
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1 vote
1 answer
51 views

Finding the minimal monic polynomial given a root

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Aditya Dwivedi
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0 answers
26 views

Distance from a tangent to a circle given radian

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Ξένη Γήινος
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0 answers
11 views

Maximum cost flow in acyclic tournament

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Alex-Github-Programmer
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0 answers
16 views

Expectation of squared normal cdf

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BMBE
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2 answers
1k views

Least Squares Estimate B1 formula

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CommunityBot
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0 votes
1 answer
26 views

limit of the integral $\int_0^A \frac{1}{n!} [\log(\frac Bx)]^n~dx$ where $A,B$ are positive constants

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Aditya Dwivedi
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1 vote
2 answers
82 views

Playing On A Saturday

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Bob Dobbs
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4 votes
1 answer
81 views
+100

How are submodules characterized with respect to the isomorphism of the direct sum of multiple modules?

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Jeremy Rickard
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0 answers
44 views

Fixed points on the disk.

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Gerd
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0 answers
36 views

Integers not containing a fixed substring in their decimal representation

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DesmondMiles
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1 vote
0 answers
20 views

Finding E[Z²Φ(Z)] using law of the unconscious statistician

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0 answers
8 views

Integral involving a product of sinh functions in the denominator

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Jog
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0 answers
14 views

Probabilistic analog of Banach fixed-point theorem

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user
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9 views

Existence of closest point projection to embedded submanifold

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user500357
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22 views

What are Transformations? and What are their properties?

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ALIN
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0 answers
60 views

Looking for a couple of sequence satisfying some conditions

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Francesco_Trig
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0 answers
9 views

Weibull distribution and mgf

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Yunji
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-1 votes
0 answers
23 views

Pairwise Independence on Non Uniform Distributions

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Greg Martin
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1 vote
1 answer
51 views

Monotone Path: For any two points $x,y$, there must exists an increasing path $t$ with terminals at $x,y$ and $f(z)$ is monotonic along the path.

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Adam Wrzesiński
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1 vote
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14 views

Induction to relate the finite sizes of unions and cartesian products of sets

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Henrik supports the community
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1 vote
0 answers
18 views

Solving an Integral Equation Using Neumann Series in $C([0,1])$

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CanDoMajoringMath
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0 votes
0 answers
11 views

Factorisation property of subalgebras

Jim's user avatar
Jim
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1 vote
1 answer
2k views

What is the best iteration method used in finite element software?

Community's user avatar
CommunityBot
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0 votes
0 answers
45 views

Solution of equation Ax = 0 for singual matrix

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Лера Чисковская
  • 1
1 vote
1 answer
37 views

Using Ito's formula to show convergence of two stochastic processes

El_mago's user avatar
El_mago
  • 106
3 votes
1 answer
31 views

Does this recursive journey through Pascal's triangle always reach $1$?

Steven Stadnicki's user avatar
Steven Stadnicki
  • 51.4k
0 votes
0 answers
16 views

Dummit & Foote (3rd ed.) 15.1.11

Ben123's user avatar
Ben123
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-1 votes
0 answers
58 views

Set theory reasoning that I don’t understand

drhab's user avatar
drhab
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0 votes
0 answers
12 views

Does Orthogonal decomposition of Hermitian matrix preserves the mirror symmetry of row norm

ketan bapat's user avatar
ketan bapat
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0 answers
15 views

Notation in Silverman's Arithmetic of EC - ideals

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Jyrki Lahtonen
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3 votes
0 answers
30 views

Proving $\frac{a+b+c}{a^2b+b^2c+c^2a+9}\ge \frac{abc+6}{abc+27}.$

TATA box's user avatar
TATA box
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3 votes
1 answer
111 views

Where did I go wrong with $\int{\frac{\ln{x}}{x + a}dx}$

George Xavier's user avatar
George Xavier
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0 votes
0 answers
16 views

What's the relationship between traditional topos theory developed in SGA4 and higher topos theory developed by Lurie?

Mike's user avatar
Mike
  • 1
-1 votes
0 answers
11 views

Find all the nonisomorphic complete bipartite graphs $G=(V,E)$ where $ |V|=6$

B G's user avatar
B G
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3 votes
2 answers
94 views

Does $\sum_{n=1}^\infty\frac{(-1)^{[\sqrt{nx}]}}{n}$ converges uniformly on $(0,1)$ or $(1,2)$?

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Harmonia
  • 327
0 votes
0 answers
23 views

Notation in Silverman's Arithmetic of EC

PatrickStewart's user avatar
PatrickStewart
  • 1
3 votes
1 answer
77 views

Find the derivative of $𝑥𝑒^{x\sin(𝜋/𝑥)}$ at $x = 0$

Gary's user avatar
Gary
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0 votes
0 answers
21 views

What is the limit of $\limsup_n\{X_n>a+\frac{1}{k}\}$ when $k\to\infty$?

Ekene E.'s user avatar
Ekene E.
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0 votes
0 answers
58 views

Absolute Galois group of the p-adic completion of a valuation field

Luc's user avatar
Luc
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0 votes
0 answers
27 views

$nC(n/2)$ mod $(n+1)$ when $n+1$ is a prime

B G's user avatar
B G
  • 462
0 votes
0 answers
9 views

Proof for the claim that finding resolution derivative is not complete.

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Janam Zaveri
  • 1
2 votes
0 answers
20 views

Almost purity for perfectoid fields applied on a computation of Galois cohomology.

Luc's user avatar
Luc
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-1 votes
0 answers
25 views

Application of Gronwall Lemma

Zhengyu Ji's user avatar
Zhengyu Ji
  • 1
-2 votes
0 answers
21 views

What are some linear algebra textbooks that contain a lot of true/false questions as exercises?

Rohit's user avatar
Rohit
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0 votes
0 answers
34 views

Order zero entire function.

Arthur's user avatar
Arthur
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0 votes
1 answer
32 views

How to prove that the only non-empty connected components in a set $S$ are singletons

copper.hat's user avatar
copper.hat
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0 votes
0 answers
24 views

Clarify 'almost surely different' and an example that has random variables with same distribution but almost surely different

TJT's user avatar
TJT
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2 votes
0 answers
39 views

Central limit theorem on small scales

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StubbornAtom
  • 16.9k
1 vote
0 answers
40 views

To find minimum value of an equation

Harshita Jain's user avatar
Harshita Jain
  • 11
0 votes
0 answers
9 views

Can someone give examples of projective non-singular algebraic varieties over $\mathbb{C}$?

someone's user avatar
someone
  • 63
4 votes
1 answer
236 views
+50

Different dot product values

Marco's user avatar
Marco
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0 answers
14 views

Valid $S_{ar}$-sentences in existential second order logic is not enumerable?

B G's user avatar
B G
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0 votes
0 answers
9 views

Help understanding Polynomial Approximation with Exponential Kernel

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Alessio Arena
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0 votes
1 answer
16 views

How to get the formula for a chance distribution when rolling a weighted value multiple times and getting the highest value

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callculus42
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0 votes
0 answers
11 views

Covering spaces of closed connected orientable surface of genus 8

Theoldsoul's user avatar
Theoldsoul
  • 1
3 votes
1 answer
83 views

Six touching circles inside a seventh imply $a+b+c=r$

B G's user avatar
B G
  • 462
0 votes
1 answer
32 views

Calculate the slope from a point on each parallel line and the distance between them

GReyes's user avatar
GReyes
  • 16.1k
3 votes
4 answers
216 views

An unusual equation for an ellipse

dfnu's user avatar
dfnu
  • 7,322
3 votes
0 answers
27 views

An intuitive explanation of the poisson equation?

Cedric Martens's user avatar
Cedric Martens
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3 votes
1 answer
53 views

On the definition of tilting of a perfectoid field

Luc's user avatar
Luc
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0 votes
1 answer
72 views

Explain intuition for probability is wrong?

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user2661923
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2 votes
1 answer
52 views

Question about a proof with moving plane method

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conjfermat
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0 votes
1 answer
34 views

Equivalent Card Combinations for n-Cards

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RobPratt
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0 votes
0 answers
12 views

Finite Difference method, ADI Scheme of Douglas and Rachford

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THAT'S MY QUANT MY QUANTITATIV
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