Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It only takes a minute to sign up.

Sign up to join this community
Anybody can ask a question
Anybody can answer
The best answers are voted up and rise to the top
Mathematics

Top Questions

Ask Question
Interesting 47 Bountied Hot Week Month
0 votes
0 answers
9 views

Finding the transformation matrix that maps one 3d plane to another 3d plane

KReiser's user avatar
KReiser
  • 61k
0 votes
0 answers
4 views

Volume of intersection of two partial spheres in spherical coordinates

KReiser's user avatar
KReiser
  • 61k
3 votes
1 answer
1k views

Homogeneous Sobolev space and distributions

Community's user avatar
CommunityBot
  • 1
0 votes
0 answers
8 views

Differentiation and counting problem

Nanda's user avatar
Nanda
  • 101
0 votes
1 answer
21 views

Question about the Thue-Morse Sequence and its relation with the Fabius function

colt_browning's user avatar
colt_browning
  • 2,128
-1 votes
0 answers
23 views

MATH 130A PROBABILITY

N. F. Taussig's user avatar
N. F. Taussig
  • 75.4k
0 votes
0 answers
15 views

Approximation of Poisson random variable with the sum of exponential random variable

엄익훈's user avatar
엄익훈
  • 47
1 vote
0 answers
14 views

Unique vector space topology on $F^n$?

Nik Weaver's user avatar
Nik Weaver
  • 251
-1 votes
0 answers
30 views

Why is LIPET or LIATE the way it is? Integration by parts

Ahmadh Hassan's user avatar
Ahmadh Hassan
  • 1
1 vote
0 answers
10 views

Trying to find an efficient algorithm for a problem involving primes

PurplePenguin1616's user avatar
PurplePenguin1616
  • 11
0 votes
0 answers
8 views

Proving a linear map of polynomials is surjective

Valor Vaporeon's user avatar
Valor Vaporeon
  • 23
0 votes
3 answers
65 views

Is the metric space c0 of sequences of real numbers converging to zero is isometric to the metric space $\ell^1(\mathbb{N})$

M W's user avatar
M W
  • 4,067
5 votes
2 answers
84 views

optimal rotations around 3D sphere using only two axes

Cesareo's user avatar
Cesareo
  • 30.8k
0 votes
0 answers
9 views

Image of Integral Operators

user273331's user avatar
user273331
  • 183
0 votes
0 answers
6 views

Combinators that form a 1-symbol basis of alternating associative combinatory logic

Legendary Wizard's user avatar
Legendary Wizard
  • 31
0 votes
0 answers
2 views

Connection between collocation methods and quadrature rules

Federico Toso's user avatar
Federico Toso
  • 173
0 votes
1 answer
22 views

Shattering Orbs - Expected cuts in a hanging chain of Orbs to arrive at the Highest Orb (Probability Question)

heropup's user avatar
heropup
  • 125k
0 votes
0 answers
13 views

Behavior of projection operators in Hilbert space

Geometer's user avatar
Geometer
  • 174
1 vote
0 answers
17 views

Evaluate $\int_{-\infty}^{\infty} \coth x \exp(-a \cosh x + b \sinh x) \, dx$

nullgeodesic's user avatar
nullgeodesic
  • 135
4 votes
0 answers
61 views

Must two groups with all subgroups of the same order be isomorphic?

Shaun's user avatar
Shaun
  • 43k
3 votes
2 answers
65 views

Check whether the map is a homeomorphism.

Kritiker der Elche's user avatar
Kritiker der Elche
  • 3,600
1 vote
1 answer
26 views

power of 2 walks of a graph

Misha Lavrov's user avatar
Misha Lavrov
  • 134k
0 votes
1 answer
134 views

Coalescent theory - Why are coalescent times independent?

amWhy's user avatar
amWhy
  • 208k
0 votes
0 answers
11 views

Solve for stagnation point distance from center of ellipse

rdemo's user avatar
rdemo
  • 21
0 votes
0 answers
24 views

Proof of equivalence between two definitions of the limit superior

Abced Decba's user avatar
Abced Decba
  • 399
0 votes
0 answers
23 views

How to find a factor of $\zeta - 1$ in $\mathbb{Q}(\zeta)$ for $\zeta := e^{2 \pi i / 5}$

3nondatur's user avatar
3nondatur
  • 3,902
0 votes
1 answer
2k views

Derive Time from Sorting Method/Time Complexity

Community's user avatar
CommunityBot
  • 1
1 vote
0 answers
60 views

Show that every open set in $\mathbb{R}$ can be written as a countable union of open intervals

K. Jiang's user avatar
K. Jiang
  • 6,411
0 votes
1 answer
12 views

An exhaustion function on a non-empty space must have a minimum value

user114263's user avatar
user114263
  • 126
1 vote
0 answers
25 views

Are there four dimensional generalizations of the Reuleaux triangle and other solids of constant width?

MWQOJYNWQA's user avatar
MWQOJYNWQA
  • 11
0 votes
0 answers
18 views

Changing variables when f(x) goes to f(-x)

requiemman's user avatar
requiemman
  • 29
0 votes
0 answers
47 views

Infimum of the Upper Sums

Paul Sinclair's user avatar
Paul Sinclair
  • 42.4k
1 vote
1 answer
55 views

inequality proof $a^n - 1 > n(a^\frac{n+1}{2} - a^\frac{n-1}{2})$

Alma Arjuna's user avatar
Alma Arjuna
  • 1,773
0 votes
0 answers
22 views

Transforming existing von Mises samples with new $\mu$ and $\kappa$

Kiord's user avatar
Kiord
  • 1
0 votes
1 answer
26 views

Number of groups possible we can compose

user2661923's user avatar
user2661923
  • 32.7k
-1 votes
1 answer
22 views

How is choosing $2$ things out $3$ and then arranging them same as choosing $1$ thing out $3$ and then choosing the $1$ thing out of the remaining $2$

TShiong's user avatar
TShiong
  • 1,257
-1 votes
0 answers
17 views

Evaluating a Line Integral Over an Equilateral Hyperbola

amWhy's user avatar
amWhy
  • 208k
0 votes
0 answers
21 views

Classical analogy of a parallel transport

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

Exended Euclidean algorithm, row reduction of Sylvester matrix, and gcd

Arrow's user avatar
Arrow
  • 13.5k
2 votes
1 answer
1k views

Determine whether the given pair of statements are contrary, contradictory, or neither.

Community's user avatar
CommunityBot
  • 1
0 votes
0 answers
15 views

Question about Schwarz Reflexion Principle Proof from Stein's complex Analysis

MathLearner's user avatar
MathLearner
  • 525
1 vote
2 answers
19 views

Numerically stable form for vector rejection between two nearly parallel vectors?

gct's user avatar
gct
  • 573
1 vote
1 answer
11 views

Birkhoff-Witt theorem and left adjoint of the embedding functor

Qiaochu Yuan's user avatar
Qiaochu Yuan
  • 409k
1 vote
3 answers
238 views

Please recommend textbook with exercises and full solutions, for a first course on Real Analysis

Eric Wofsey's user avatar
Eric Wofsey
  • 323k
0 votes
0 answers
12 views

Equivariant cohomology and Cartan cohomology

user984949's user avatar
user984949
  • 111
-3 votes
0 answers
11 views

Consider Euclidean space R 3 and let W be the subspace that has a basis

chrstphrrrrrrrrrr's user avatar
chrstphrrrrrrrrrr
  • 1
0 votes
1 answer
18 views

Estimating mean of a random variable

BGM's user avatar
BGM
  • 6,893
4 votes
1 answer
38 views

How to count the number of line segments in a knotwork?

caduk's user avatar
caduk
  • 3,391
4 votes
1 answer
103 views

Sylvester matrix without coordinates and its geometry

Qiaochu Yuan's user avatar
Qiaochu Yuan
  • 409k
0 votes
0 answers
21 views
+50

Finding implicit form of Nyquist curve without using a general algorithm for Groebner bases.

Math Keeps Me Busy's user avatar
Math Keeps Me Busy
  • 493
0 votes
1 answer
39 views

Doubt in algebraic closure of a finite fields

Alphyte's user avatar
Alphyte
  • 179
0 votes
1 answer
16 views

Maximum number of edges in a Line Graph L(G)

yanjunk's user avatar
yanjunk
  • 189
-1 votes
0 answers
20 views

Need help solving limit with exponential and factorial

Chappie733's user avatar
Chappie733
  • 1
2 votes
2 answers
34 views

Is $\sin\left(\frac{2\pi k}{N}\right) + \sin\left(\frac{2\pi k(N-1)}{N}\right) =0$?

Ajin Shaji Jose's user avatar
Ajin Shaji Jose
  • 318
0 votes
0 answers
9 views

Transformation of Curves Using a Function

Ayesca's user avatar
Ayesca
  • 562
2 votes
2 answers
578 views

Is the moment generating function smooth by definition?

No-one's user avatar
No-one
  • 580
0 votes
1 answer
36 views

Euler class of a vector bundle over sphere.

user17786's user avatar
user17786
  • 1,386
1 vote
1 answer
34 views

Are there binomials of degree $n$ that can be factored into more than $O(\log n)$ distinct factors?

Qiaochu Yuan's user avatar
Qiaochu Yuan
  • 409k
1 vote
0 answers
34 views

Explicit expression for $\int_{0}^{2\pi}e^{-\alpha\cos(\theta)(1+\gamma\cos(\theta))}d\theta$

Thomas Andrews's user avatar
Thomas Andrews
  • 175k
1 vote
1 answer
31 views

Question about uniform continuity from Stein's Complex Analysis

Ajin Shaji Jose's user avatar
Ajin Shaji Jose
  • 318
2 votes
0 answers
111 views

Is it a good idea to learn about hyperreals and how they are related to limits before beginning to learn about calculus?

José Carlos Santos's user avatar
José Carlos Santos
  • 421k
1 vote
1 answer
28 views

What is the technical terminology for defining the biggest natural number that allows for an inequality?

Misha Lavrov's user avatar
Misha Lavrov
  • 134k
0 votes
0 answers
29 views

Calculate the integral with branches

TShiong's user avatar
TShiong
  • 1,257
0 votes
0 answers
19 views

Min Max Function Binary Indicator Optimization Result representation

TShiong's user avatar
TShiong
  • 1,257
0 votes
0 answers
27 views

Show that $T$ is a topological embedding of $X$ in itself.

it's a hire car baby's user avatar
it's a hire car baby
  • 9,194
1 vote
0 answers
16 views

Use of the inequality $A \succeq B^{\dagger}$ when B is not invertible

Burak's user avatar
Burak
  • 51
0 votes
0 answers
9 views

How should I prove that $a \ast b \not\sim b \ast a$ as based loops at $(0,0,0)\ $?

Akiro Kurosawa's user avatar
Akiro Kurosawa
  • 417
10 votes
1 answer
334 views

Polyhedron with only π/4 dihedral angles

Dr. Richard Klitzing's user avatar
Dr. Richard Klitzing
  • 4,021
4 votes
0 answers
40 views
+50

Conditional Gaussian Comparison Inequality

Michael Li's user avatar
Michael Li
  • 47
1 vote
0 answers
32 views

Diagonal convergence on a compact set implies uniform convergence (Proof verification)

Leonidas's user avatar
Leonidas
  • 1,023
1 vote
1 answer
15 views

Entropy: Show that $2[H(X, Y ) + H(Y, Z) + H(Z, X)]\geq 3H(X, Y, Z) + H(X) + H(Y ) + H(Z)$.

stochasticboy321's user avatar
stochasticboy321
  • 7,308
1 vote
1 answer
33 views

On a convergent and divergent Picard iteration

sunny's user avatar
sunny
  • 691
1 vote
0 answers
23 views

Heat flow outside a disk

Steffen's user avatar
Steffen
  • 11
0 votes
0 answers
39 views

Let $A=\mathbb Q[x_1,...,x_n]$ and let $M$ be an $A$-module. Show that $l_A(M)$ is finite if and only if $\dim_{\mathbb Q}(M)$ is finite.

Erica Yu's user avatar
Erica Yu
  • 1
3 votes
1 answer
37 views

Multi variable integral : $\int_{0}^{1}\int_{0}^{\sqrt{1-x^2}} \frac{e^y}{\sqrt{1-x^2-y^2}} dy dx$

Ninad Munshi's user avatar
Ninad Munshi
  • 32.4k
0 votes
0 answers
16 views

How to find the normal form of the given differential equation

Gonçalo's user avatar
Gonçalo
  • 4,457
0 votes
0 answers
24 views

Is the Vandermonde Matrix Representing an Isomorphism?

Aristarchus_'s user avatar
Aristarchus_
  • 363
1 vote
1 answer
3k views

How to find the laplace transform of $\cos(\sqrt t)$?

Community's user avatar
CommunityBot
  • 1
-1 votes
0 answers
16 views

show a combination proof by induction. I dont know how to continue

pustolerro's user avatar
pustolerro
  • 37
1 vote
0 answers
22 views

Conditions that lead empirical set of covariance matrices to follow optimal transport path?

dherrera's user avatar
dherrera
  • 148
0 votes
0 answers
19 views

Solving two equations with two unknowns yields same result as solving the sum of the equations (node voltages)

Carl's user avatar
Carl
  • 671
6 votes
2 answers
781 views

Finding a coprime of a general magnitude.

Pierre's user avatar
Pierre
  • 129
0 votes
0 answers
16 views

quadratic optimisation with L1 constraints with cvxpy

jam123's user avatar
jam123
  • 1
1 vote
0 answers
26 views

Spivak Calculus on Manifolds Problem 5-31

john's user avatar
john
  • 33
0 votes
0 answers
6 views

Necessary condition for a minimizer in a convex and closed set

coboy's user avatar
coboy
  • 1,212
1 vote
0 answers
30 views

Find an SO(3)-equivariant continuous function from $(\mathbb{R}^3)^n$ to SO(3)

Didier's user avatar
Didier
  • 61
0 votes
0 answers
9 views

Why do the projective objects in a ribbon category form an ideal?

D.N. Yetter's user avatar
D.N. Yetter
  • 11
5 votes
0 answers
44 views

"put together" elementary substructures

Julián's user avatar
Julián
  • 616
0 votes
0 answers
5 views

Transform 2d finite element into standard 2d element

N00BMaster's user avatar
N00BMaster
  • 97
0 votes
0 answers
13 views

Analogue of Mostow Rigidity for $3$ dimensional Anti-de Sitter space

user1180312's user avatar
user1180312
  • 35
1 vote
0 answers
17 views

Spivak 4-23 How to construct the $k$-cell?

Redcrazyguy's user avatar
Redcrazyguy
  • 353
5 votes
0 answers
90 views

Given analytic $F(x)$ find $f(x)$ such that $\forall x. F(x) = f(f(x))$

Math Keeps Me Busy's user avatar
Math Keeps Me Busy
  • 493
1 vote
0 answers
33 views

How many angles are being formed in the attached image?

Anton Vrdoljak's user avatar
Anton Vrdoljak
  • 2,316
3 votes
1 answer
29 views

Almost sure convergence in density of infinite dimensional product measure of normal distributions unsing Kakutani's theorem

John Dawkins's user avatar
John Dawkins
  • 24.5k
0 votes
1 answer
106 views

Some misunderstandings with the formal developments of polynomials

EE18's user avatar
EE18
  • 1,169
1 vote
0 answers
13 views

What would the parallellepiped of continuity look like?

Redcrazyguy's user avatar
Redcrazyguy
  • 353

Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.