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

Explore our Questions

Ask Question
more tags
Interesting 63 Bountied Hot Week Month
1 vote
0 answers
18 views

Full derivation inside of twin prime statement in terms of multiplicative arithmetic functions. How can the last formula be rearranged?

user avatar
DiagramChasingBlues
  • 19.5k
1 vote
1 answer
18 views

Miller-Rabin primality test final decision.

user avatar
Misha Lavrov
  • 113k
0 votes
0 answers
52 views

Does $AX+XB=B$ have a unique solution?

user avatar
Swapnajit Das
  • 589
3 votes
1 answer
18 views

Show that there exists open sets $P$ and $Q$ in $X$ such that $p \in P, S \subseteq Q$, and $P\cap Q = \emptyset$ in the metric space $(X,d)$

user avatar
User01
  • 15
0 votes
0 answers
8 views

If a subset of $\mathbb{R}^k$ is bounded, then it's a subset of some $k$-cell

user avatar
Pancake Tha God
  • 33
1 vote
1 answer
1k views

Why the function $w=e^z$ maps the lines $x=c$

user avatar
CommunityBot
  • 1
1 vote
0 answers
5 views

Realizing a neighborhood in $\mathbf{Gr}(k,n)$ as a neighborhood in $\mathbf{Gr}(1,n)$

user avatar
ithmath
  • 11
6 votes
3 answers
179 views

$\sum_{k=0}^\infty\frac{1}{k+1}\binom{3k+1}{k}\left(\frac{1}{2}\right)^{3k+2}$ converges to $\frac{3-\sqrt{5}}{2}$?

user avatar
metamorphy
  • 30.9k
2 votes
0 answers
15 views
+50

Simply connected in "An application of second variation to submanifold theory"

user avatar
lanse7pty
  • 5,028
1 vote
0 answers
35 views
+200

Does Lipschitz-kind "non-scalar ODEs" and PDEs could stand having finite-duration solutions?

user avatar
Joako
  • 819
0 votes
0 answers
13 views

Quadratic programming with diagonal matrix

user avatar
liao weilong
  • 1
0 votes
0 answers
8 views

Numerical Approach to Infinite Improper Integrals

user avatar
Mateo Guajardo
  • 1
1 vote
1 answer
18 views

Prove that $\{x\in A:P(x)\}$ is always a subset of $A$

user avatar
Bertrand Wittgenstein's Ghost
  • 855
1 vote
0 answers
39 views

Spectral theory and and a problem in $\ell^{2}$

user avatar
a dysthemic student
  • 133
2 votes
2 answers
1k views

Domain of $\operatorname{Arg}(1/z)$: $\operatorname{Re}(z) \neq 0$

user avatar
Guru
  • 1
0 votes
0 answers
9 views

argument principle and Roche theorem

user avatar
User01
  • 15
2 votes
1 answer
13 views

Convert Ellipsoid from Cov and Mean to Quadric Representation

user avatar
Binxu Wang 王彬旭
  • 575
8 votes
1 answer
109 views

Is every ring a homomorphic image of some abelian group's endomorphism ring?

user avatar
Jeremy Rickard
  • 24.8k
1 vote
3 answers
75 views

If $\overline{A}\cap\overline{B}=\emptyset$, then $b(A)\cup b(B) = b(A\cup B)$

user avatar
copper.hat
  • 161k
1 vote
0 answers
22 views

Show that $\left(V_{n}\right)_{n \geq 1}$ converges in $L_{1}$

user avatar
codelearner
  • 245
1 vote
0 answers
7 views

How to create synthetic data for a decaying curve in order to extrapolate it beyond some point?

user avatar
Roosha
  • 11
0 votes
1 answer
9 views

Can you calculate (or estimate) standard deviation using mean, median, and sample size?

user avatar
K.Power
  • 5,884
0 votes
0 answers
2 views

Queueing multiple variables beyound Markov Blanket in Bayesian network

user avatar
user184868
  • 145
1 vote
0 answers
9 views

Misapplication of the divergence theorem when calculating a surface integral?

user avatar
user1057909
  • 11
0 votes
0 answers
6 views

Hashing function for Tic-Tac-Toe board concidering symmetry.

user avatar
user184868
  • 145
0 votes
0 answers
9 views

Taking An Average or Not

user avatar
timlab
  • 1
0 votes
0 answers
12 views

Probability of a two-state continuous Markov chain

user avatar
Alex
  • 627
1 vote
0 answers
14 views

Error in exercise 1.3.9 of Folland's advanced calculus

user avatar
user912011
  • 664
3 votes
0 answers
50 views

Prove $\neg (\;(\;\neg \; p \;\land q \;) \lor (\; \neg \; p \; \land \neg \; q)) \equiv p$ using logical equivalence

user avatar
jack_cashman1
  • 31
1 vote
1 answer
230 views

Question on definition of $\;\alpha-$Holder norms

user avatar
Alp Uzman
  • 6,664
0 votes
1 answer
16 views

$M_k:=\{(x_1,...,x_n)\in \mathbb{R}^n: x_k>x_{k+1}\}$ is open with respect to eucildean metric

user avatar
DanielWainfleet
  • 53.1k
0 votes
1 answer
9 views

For a linear differential equation with periodic coefficients, unicity implies existence of a solution.

user avatar
Robert Israel
  • 416k
0 votes
0 answers
40 views

Solving system of equations where variables are multiplied together

user avatar
Dan
  • 101
3 votes
1 answer
56 views

Is a map which sends a $3\times 3$ symmetric tensor to an element of $SO(3)$ which diagonalizes it necessarily discontinuous?

user avatar
Anthony Carapetis
  • 32.8k
1 vote
0 answers
11 views

Does multiple integral have the second definition?

user avatar
Huesic
  • 21
1 vote
0 answers
16 views

Proof verification: Demonstrating that the unit circle is path-connected

user avatar
Cardinality
  • 167
-1 votes
0 answers
70 views

Expressing rationals in a dense set $(0,1)$ as the average of two rationals

user avatar
user7013
  • 17
1 vote
0 answers
27 views

Laurent series of $e^z$

user avatar
79999
  • 67
1 vote
1 answer
21 views

Lee Smooth Manifolds Theorem 6.23's Jacobian Matrix

user avatar
usr0192
  • 2,756
1 vote
2 answers
26 views

Variance of product of Gaussian random variables

user avatar
Binxu Wang 王彬旭
  • 575
3 votes
0 answers
84 views

Is a transitive group more likely to be soluble if its degree has more prime divisors?

user avatar
James
  • 8,697
0 votes
1 answer
22 views

Regarding proof of Bolzano's theorem (Csez Kosniowski)

user avatar
LGu
  • 116
0 votes
1 answer
8 views

Foliations as equivalence relations

user avatar
Alp Uzman
  • 6,664
3 votes
1 answer
26 views

Can eigenvalues be interpreted as coordinates in a vector space of projection operators?

user avatar
Theo Bendit
  • 42.3k
1 vote
1 answer
6 views

Geometric interpretation of dual generalized inequalities in 2D using proper cone and its dual cone.

user avatar
viv
  • 11
0 votes
1 answer
48 views

Is this conclusion from $⟨\alpha⟩=⟨\alpha^k⟩$?

user avatar
fitzcarraldo
  • 898
0 votes
0 answers
13 views

About the group created by the inverse, conjugate, and transpose operations acted on a normal operator.

user avatar
Hongyi Zhao
  • 45
-2 votes
0 answers
29 views

clarification on subspaces concerning polynomials

user avatar
Arturo Magidin
  • 355k
1 vote
1 answer
2k views

Probability statements in a true or false format

user avatar
CommunityBot
  • 1
3 votes
1 answer
114 views

Definition of Hölder Space on Manifold

user avatar
Alp Uzman
  • 6,664
0 votes
0 answers
9 views

Comparing the ranks over $\mathbb{Q}$ and $\mathbb{C}$ of a matrix of $\mathcal{M}_n(\mathbb{Z})$

user avatar
Made
  • 1,191
1 vote
1 answer
60 views

What's the definition of $C^\alpha$ norm of a tensor?

user avatar
Alp Uzman
  • 6,664
1 vote
0 answers
41 views

$\int x^{e^x}dx$

user avatar
温泽海
  • 1,194
5 votes
2 answers
117 views
+50

Prove that points E, H, and F are collinear

user avatar
Blue
  • 69.2k
3 votes
1 answer
59 views

Why is Kelly's criterion a suitable objective to optimise?

user avatar
RobPratt
  • 32.9k
8 votes
0 answers
242 views

A geometrical analogy between $1/x$ and $\sqrt{x}$

user avatar
Hans-Peter Stricker
  • 17.2k
0 votes
1 answer
28 views

Derivative in the distributional sense

user avatar
Donnie Darko
  • 371
0 votes
1 answer
14 views

How many combinations does this cube have and what is the probability that we get all of the same colour?

user avatar
Ethan Bolker
  • 79.8k
0 votes
0 answers
25 views

Probability and expected time a symmetric random walk hits the graph of $f(x) = x$

user avatar
Invinciible
  • 71
1 vote
0 answers
18 views

Unique solution to the KKT conditions for a convex problem

user avatar
Convex_guy
  • 31
1 vote
0 answers
28 views
+50

prove that the sequence $A_n$ satisfies a particular formula

user avatar
user3472
  • 861
1 vote
1 answer
23 views

The empty set in Ackermann set theory

user avatar
Noah Schweber
  • 218k
2 votes
0 answers
21 views

Reference request for perfection of schemes over finite fields

user avatar
Suzet
  • 4,537
0 votes
1 answer
29 views

Define a conic section relative to its vertices

user avatar
David K
  • 85.3k
1 vote
0 answers
32 views

Is the following set a continuum?

user avatar
Urixml23
  • 49
1 vote
2 answers
32 views

Construct several parabolas passing through two given points

user avatar
KReiser
  • 49.6k
1 vote
1 answer
27 views

What separation properties are preserved by $f: X \longrightarrow Y$ continuous and surjective

user avatar
Ruy
  • 13.2k
1 vote
1 answer
13 views

Not a locally compact space that can be represented as union of two locally compact spaces (open and close) [R. Engelking, exercise 3.3.C]

user avatar
311411
  • 2,820
1 vote
0 answers
13 views

What is a translation matrix in the direction of v= (1, 2, 3)

user avatar
Jacob
  • 11
2 votes
1 answer
27 views

a continous map from a topological space to itself is open

user avatar
paul garrett
  • 46.2k
1 vote
1 answer
17 views

Using Comparison test with complex numbers

user avatar
Kavi Rama Murthy
  • 300k
1 vote
0 answers
43 views

"At least one" Probability, what is wrong with this logic?

user avatar
Jose Avilez
  • 9,725
1 vote
0 answers
12 views

Integral of multiple conditional probability

user avatar
Jose Avilez
  • 9,725
1 vote
0 answers
9 views

Probability of pair of gloves selection

user avatar
nimen55290
  • 143
5 votes
1 answer
919 views

Book suggestions for extensive self study

user avatar
CommunityBot
  • 1
1 vote
0 answers
4 views

Is there a efficient way to find only the combinations of interest from V exciting in P

user avatar
shakthydoss
  • 111
1 vote
0 answers
10 views

Doubt on how to represent the Complement of a set in relation to another

user avatar
Yuri Bittencourt
  • 11
2 votes
0 answers
20 views

Prove the norm-preserving matrix extension theorem $\min\Vert\binom{A~C}{B~W}\Vert_2=\max\{\Vert\binom{A}{B}\Vert_2,\Vert(A~~C)\Vert_2\}$ by symmetry?

user avatar
Ho-Oh
  • 661
2 votes
1 answer
36 views

Number of critical points of $f(x)=(x+\ln x)^x$ on $[1,\infty)$

user avatar
River Li
  • 22.4k
1 vote
0 answers
12 views

Finding Maximal Volume at Constant Surface Area

user avatar
bush
  • 11
3 votes
0 answers
627 views

Hölder continuity for exponent > 1

user avatar
Alp Uzman
  • 6,664
1 vote
1 answer
12 views

How can I find the average output of my Markov Chain based random number generator?

user avatar
Leander Tilsted Kristensen
  • 4,659
1 vote
0 answers
17 views

dilatation analytic

user avatar
zoran Vicovic
  • 29
1 vote
0 answers
13 views

How to derive a coordinate system from distance measures to reference points

user avatar
Alan Salinas
  • 19
1 vote
0 answers
6 views

2D Ternary plot equivalent for >3 dimensions

user avatar
big-o
  • 111
1 vote
1 answer
24 views

How can other unknowns be calculated in polynomial division given there are no remainders?

user avatar
Yia War
  • 15
2 votes
0 answers
14 views

What kinds of graphs are known to exhibit sharp threshold for bernoulli percolation?

user avatar
Alan
  • 648
2 votes
0 answers
26 views
+50

Kneser theorem about the Klein bottle

user avatar
Zaragosa
  • 1,413
0 votes
0 answers
7 views

How to prove that the derivatives of bent functions are balanced?

user avatar
YWu
  • 31
2 votes
0 answers
25 views

How to prove $\forall x\; (\phi (x)\land \psi (x) ) \rightarrow \forall x\; \psi (x)$ without using the completeness theorem?

user avatar
boyler
  • 187
-1 votes
0 answers
9 views

Description of a map on $\mathbb{F}_p[x]$ based on ordered pairs of polynomials

user avatar
Ari
  • 637
0 votes
0 answers
31 views

Estimation for the integral of square function from its integral

user avatar
math is fun
  • 1,036
0 votes
0 answers
12 views

Convert dataset of discrete changes

user avatar
MKZ
  • 101
0 votes
0 answers
12 views

prove that the sets $\{A_k\}$ are pairwise disjoint and that all numbers in $A_k$ are $\equiv (\frac{1}2 3^{k-1}, 3^{k-1}] \mod 3^{k}$

user avatar
Fred Jefferson
  • 756
2 votes
0 answers
88 views
+50

What is wrong with my proof on elementary prime gaps?

user avatar
mertunsal
  • 415
3 votes
0 answers
59 views
+150

Question about the solution to the heat equation in spherical coordinates

user avatar
DougL
  • 274
Browse more 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.