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Interesting 30 Bountied Hot Week Month
9 votes
4 answers
437 views

How to set the limits of a definite integral by substitution?

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Math Guy
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1 vote
0 answers
10 views

Trying to find three successive triangular numbers whose sum is a perfect square.

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xoco
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-2 votes
0 answers
6 views

Question about pushforward.

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Pedro Passerini
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1 vote
2 answers
28 views

Total number of paths

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Especially Lime
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-1 votes
0 answers
16 views

About recursive function enhancer

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Ma Ye
  • 499
7 votes
1 answer
93 views

Number of Sylow $7$- and $13$-subgroups in a group of order $11830$

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Ash
  • 492
0 votes
0 answers
3 views

Find an effeicent algorithm to find for every vertex 𝑣 ∈ 𝑉, a path from 𝑠 to 𝑣 with maximum weight.

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User33975329257439645
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0 answers
6 views

Can I choose whatever variable I want for $F$ when using d'Alembert's formula in PDEs?

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Nate3384
  • 201
0 votes
2 answers
39 views

Don't understand just this one part of a solution for pell's equation

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Guruprasad
  • 553
2 votes
2 answers
42 views

Subspace topology corresponds to the induced topology of inclusion map, a specific proof

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TomG
  • 73
0 votes
1 answer
355 views

Number of Partitions of a Set with Repeated Elements

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Raymond Kan
  • 13
0 votes
0 answers
5 views

What is the Simple Summation of a fraction involving trigonometric ratios, with alternating signs?

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Tejas parashar
  • 41
-3 votes
0 answers
11 views

for any 2 non zero integers a and b we have [a,b] (a,b) = |ab| number theory

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Gursimran Kaur
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0 votes
0 answers
18 views

Improper integral involving four integration variables

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Tensor
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0 answers
21 views

A "backward" complete induction

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merto
  • 61
13 votes
5 answers
2k views

Stirling numbers of the second kind on Multiset

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Raymond Kan
  • 13
-2 votes
0 answers
10 views

Minimum value of the sum of infinite series

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NB_1907
  • 97
0 votes
1 answer
2k views

Showing that rotation about the origin and generally is an isometry

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CommunityBot
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-2 votes
0 answers
14 views

Lower bound for infinite sum of reciprocal of prime powers

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Abhik
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0 votes
0 answers
6 views

Could someone suggest a function in R that takes # of sigmas and predicts the proportion of data in normal distribution that falls within this range?

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Pavel Shliaha
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4 votes
1 answer
111 views

Possible Generalization of the Fubini-Study Metric on the Holomorphic Vector Bundles of $\mathbb{P}_\mathbb{C}^n$

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J1U
  • 1,165
1 vote
1 answer
52 views

Prove a quartic curve intersect a circle at four points and orthogonally

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hbghlyj
  • 3,763
3 votes
0 answers
27 views

Every positive integer can be written as a sum of distinct integral powers of $\varphi$ if $\varphi^a+\varphi^b=2$

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aqualubix
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0 votes
0 answers
20 views

∆ABC and point D on it. O1,O2,O3 are the centers of the circumcircles of triangles ∆ABC, ∆ACD, and ∆ABD. Prove that AO3O1O2 is a Cyclic quadrilateral.

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seyed parham moosavi nezhad
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0 votes
0 answers
4 views

Distribution of edges length for a new node in a graph

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Tanguy Damart
  • 1
10 votes
0 answers
237 views
+250

Evaluate $\sum_{k=1}^\infty \frac{(4 k-1) 2^{8 k}}{k^5 (2 k-1) \binom{2 k}{k}^4}$

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pisco
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0 answers
22 views

How to determine if its possible to light up all light bulbs?

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Tim Dzikowski
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1 vote
1 answer
60 views

Let $a$ be an odd integer number. Show that there is no $x\in R$ such that $x^2*[x]+a=[x^3]+[x]^2*\{x\}$

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Pam Munoz Ryan
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0 answers
24 views

Strange sequence of rational asymptotes from $\frac{1}{\sin\left(\frac{1}{x}\right)}$

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artemetra
  • 399
2 votes
1 answer
13 views

Realizing rational numbers as proportions of some arithmetical progression

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Chris Lewis
  • 3,323
4 votes
0 answers
91 views
+50

Similarity between Configuration Spaces and Monad of little cube Operad.

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Alessandro Fenu
  • 319
0 votes
0 answers
17 views

Why can't the arc length of a curve be found by approximating the arc length of a sector?

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qqq
  • 1
2 votes
0 answers
15 views

Uniqueness of solution of the Dirichlet problem of second order elliptic equation in small region.

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gaoqiang
  • 282
0 votes
1 answer
72 views

What symmetries does the 'Chebyshev' three-term recurrence relation have?

Michael T's user avatar
Michael T
  • 11
0 votes
1 answer
25 views

Prove $d\varphi$ is Lie algebra isomorphism

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Josef K.
  • 555
0 votes
1 answer
1k views

Is this Baire theorem a special case of Baire category theorem?

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CommunityBot
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10 votes
4 answers
218 views

Uniqueness of ODE solution to $(1+y'^2)\cdot y = k$ (brachistochrone problem)

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Martin
  • 149
1 vote
2 answers
64 views

Does this infinite sum converge or diverge?

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zkutch
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0 answers
36 views

Is it possible that $f(rx)=rf(x)$ for all $x\in\mathbb{R}$ and $r\in\mathbb{Q}$ but fails the additivity?

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Davide Masi
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0 votes
0 answers
12 views

Relation between Krull dimension of ideal and its radical

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joap
  • 43
-1 votes
0 answers
7 views

The $L^p((0,T);W^{2,q}(\Omega))$ regularity of the heat equation

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Ocean
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0 answers
30 views

Does 'either-or' mean 'at least one of'?

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Mauro ALLEGRANZA
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0 answers
12 views

How to recover the elements of a diagonal matrix that produce specific values in another domain

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Sajjad
  • 167
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0 answers
17 views

Recursive sequence to a defined sequence

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hasan darwish
  • 69
10 votes
6 answers
510 views

How can I evaluate $\int \frac{x^3+2x-7}{\sqrt{x^2+1}}\mathrm dx?$

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Mathematics
  • 783
4 votes
2 answers
132 views

how to prove $H'A' \perp OP $

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J.Simpson
  • 125
5 votes
2 answers
174 views

Can a triple product of characters be irreducible?

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Nicky Hekster
  • 50.9k
-2 votes
1 answer
20 views

Find all real solutions to the following equations via different methods

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MathStackexchangeIsMarvellous
  • 6,756
3 votes
1 answer
47 views

Determine the type of equilibrium point

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Cesareo
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5 votes
1 answer
84 views

Is $x^my^n+x^py^q+1$ irreducible in $\mathbb{C}[x,y]$?

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Amateur_Algebraist
  • 1,741
0 votes
1 answer
2k views

Taylor Series Method for a first order ODE

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CommunityBot
  • 1
2 votes
1 answer
60 views

Spectrum of a Satisfiable Sentence

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Hosein Rahnama
  • 15.3k
2 votes
4 answers
400 views

Expected time to fall

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true blue anil
  • 45.9k
0 votes
0 answers
19 views

Does exponential cone optimization is more challenging to solve than second order cone optimization?

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Tuong Nguyen Minh
  • 201
0 votes
1 answer
51 views

Solution of a Second order Partial Differential Equation

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gpmath
  • 1,457
-1 votes
0 answers
13 views

Precedence of some operators

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MathStackexchangeIsMarvellous
  • 6,756
5 votes
2 answers
1k views

Degenerate simplex is the degeneracy of a unique non-degenerate simplex

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Sergei Ivanov
  • 206
0 votes
0 answers
15 views

Final Value Theorem for a function that diverges to infinity?

PtH's user avatar
PtH
  • 1,164
1 vote
1 answer
39 views

Boundedness in $L^p$ and convergence in $L^1$ implies weak convergence in $L^p$

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Davide Giraudo
  • 178k
1 vote
1 answer
34 views

Show that the equilibrium point of the system $(\dot{x}, \dot{y})=(y,q(t)x)$ is not asymptotically stable

Gerd's user avatar
Gerd
  • 8,909
1 vote
0 answers
13 views

Normal forms of nilpotent matrices over RINGs - Jordan, Smith, etc..

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Alexander Chervov
  • 689
6 votes
1 answer
264 views

Product of quotient spaces vs. quotient of product spaces

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tkf
  • 14k
1 vote
0 answers
17 views

Not understanding reflection of function across lines

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JustWantToLearn
  • 11
0 votes
0 answers
16 views

In affine geometry, why are the intersections of an $E_p$ with the coordinate $E_{n-p}$'s unique points?

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Steven Thomas Hatton
  • 3,451
0 votes
0 answers
9 views

Order lines by depth from center

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pollatron
  • 23
1 vote
1 answer
923 views

Relations of subgroups of GL(3, R)

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CommunityBot
  • 1
0 votes
0 answers
31 views

Arbitrary product in the category of graded vector spaces

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Saikat
  • 1,657
1 vote
1 answer
42 views

Are the proposed truth tables for the rules correct?

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Mauro ALLEGRANZA
  • 96.8k
0 votes
0 answers
18 views

Indefinite quaternionic unitary group

Ein's user avatar
Ein
  • 295
1 vote
0 answers
12 views

Joint convergence with constant transformed marginal

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Florian R
  • 1,209
-2 votes
0 answers
13 views

Composition of operators is compact

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kaeli
  • 9
0 votes
0 answers
57 views

Prove a lemma for the formulas for linear probing(An exercise from the book by Knuth)

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Felix
  • 1
0 votes
1 answer
23 views

Linearization of Linear Fractional Constraint

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Avalpreet Singh
  • 1
1 vote
0 answers
40 views

What is the "measure-theoretic product"?

Luis G's user avatar
Luis G
  • 1
1 vote
0 answers
26 views

Max of a 2 variable function on a compact set

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Nicola Sottocornola
  • 11
3 votes
1 answer
32 views

Finding the number of binary search trees with specific conditions

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ploosu2
  • 10.9k
3 votes
1 answer
302 views

Thm: If n is an odd pseudo prime number, then $M_n = 2^n-1$ is a larger one.

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rosshjb
  • 148
1 vote
0 answers
26 views

Is $f(x-y)g(y)$ supported in some $\sigma$-finite set?

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zxcv
  • 1,583
2 votes
1 answer
31 views

Conformal Map of a Simply Connected Region to a Disk Centered at the Origin

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Bruno B
  • 6,651
2 votes
0 answers
17 views

Riemannian Langevin dynamics choice of metric?

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Arctic Char
  • 16.5k
3 votes
1 answer
46 views

Transversality condition in calculus of Variations

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Adiya Bayarmaa
  • 9
857 votes
0 answers
51k views

A proof of $\dim(R[T])=\dim(R)+1$ without prime ideals?

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A. P. Kodzis
  • 1
0 votes
0 answers
26 views

Can Tonelli or Fubini Be Used to Interchange Limits in a Summation?

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BTZww
  • 167
1 vote
1 answer
87 views

What is the formal adjoint of Hessian?

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peek-a-boo
  • 62.1k
1 vote
0 answers
14 views

Names for maps of the form $A \to \mathcal{M}(B)$ between $C^*$-algebras

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Zorngo
  • 1,561
0 votes
0 answers
10 views

Versions of Margulis lemma in hyperbolic space

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Heinrich Li
  • 65
0 votes
0 answers
86 views

Given an irrational number, construct the desired irrational number.

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Mohammad tahmasbi zade
  • 325
18 votes
0 answers
405 views

Solution to integral $\int \frac{1}{x-x \, \text{cot}(x)+1} \, dx$

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Тyma Gaidash
  • 12.8k
0 votes
0 answers
28 views

How to calculate $y$ value from the given data

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Gonçalo
  • 12.3k
2 votes
1 answer
59 views

How to show this $\ell^p$ inequality

Bruno B's user avatar
Bruno B
  • 6,651
3 votes
1 answer
108 views

Recursive formula for multi-dimensional Gaussian integrals

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Mdoc
  • 2,196
0 votes
0 answers
20 views

Complete Intersections as Branched Cover of $\mathbb{P}^1$

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QGravity
  • 253
0 votes
0 answers
6 views

RKHS, Norms and Regularization

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Red
  • 385
1 vote
1 answer
40 views

Proving Factorability of Limits

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PrincessEev
  • 48.5k
0 votes
1 answer
36 views

Prove or disprove: A locally compact cell complex is a CW-complex

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Ronald J. Zallman
  • 1
3 votes
2 answers
128 views

Generalization of "Fermat–Apollonius circle"

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