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

Explore our questions

0 votes
1 answer
42 views

Probability a factor is odd

3 votes
1 answer
71 views

What is the maximum area of this structure made out of triangles?

2 votes
0 answers
64 views
+50

On which 2D surfaces in 3D can a Kagome lattice pattern be drawn using three sets of parallel lines"?

0 votes
0 answers
12 views

Exercise 5, Section 3.7 of Hoffman’s Linear Algebra

6 votes
0 answers
123 views
+200

What is 12-fold Stampfli-inflation tiling and where/how can I recognize it in this analysis of dodecagonal 30° twisted bilayer graphene quasicrystal?

-3 votes
0 answers
31 views

Prove matrix $A$ can be written as the sum of $k$ such matrices

2 votes
1 answer
33 views

What is the probability of choosing $n$ linearly independent vectors in $\mathbb{R}$ over $\mathbb{Q}$?

0 votes
0 answers
8 views

Orthogonal vector closest to target vector.

2 votes
2 answers
57 views

If $T: E \rightarrow E$ is a bounded linear operator, then $e^T$ is as well

1 vote
0 answers
8 views

Question about integration by parts for quotiens

1 vote
0 answers
5 views

Equivalent subbases for the weak operator topology on $B(H)$?

2 votes
0 answers
11 views

$k$-means clustering as an operator

1 vote
0 answers
7 views

all integer solutions to the following system possible?

1 vote
1 answer
16 views

Proving a relation is a mapping

1 vote
0 answers
9 views

Help understanding why we can't treat lines as circles in a complex integral

2 votes
1 answer
23 views

Two isomorphic subgroup of $\pi_1$ acts on the universal cover, can the quotient be homemorphic?

1 vote
0 answers
7 views

Will tensor calculus be still valid if metrilinic property is violated?

0 votes
1 answer
31 views

How many dice should I roll for getting all unique values more likely than not

2 votes
1 answer
2k views

Find coordinate vector for change of bases when matrix is non-square

2 votes
0 answers
10 views

Exercise 3, Section 3.7 of Hoffman’s Linear Algebra

3 votes
1 answer
50 views

Asymptotic distribution of $T= \frac{\hat{p_2}-\hat{p_1}}{\sqrt{\frac{2 \hat{p} \hat{q}}{n}}}$

0 votes
2 answers
16 views

Prove that correlation coefficients are equal between two random variable equations

3 votes
0 answers
25 views

Are there any non-constant differentiable functions $f : \mathbb R \to \mathbb R$ where each $t \in \mathbb R$ has $f(t)f(f'(t))=1$?

0 votes
1 answer
18 views

Permutation of coordinates -- looking for a notational advice

2 votes
2 answers
71 views

Equations and truth tables

1 vote
0 answers
15 views

How to discretize the bioheat equation to solve with finite difference method.

2 votes
1 answer
43 views

ZFC without Power Set, effect of adding well ordering or not.

0 votes
0 answers
22 views

Which values can be reached by period doubling bifurcation?

1 vote
0 answers
13 views

pdf Distribution of Trace of Inverse Wishart matrix

0 votes
0 answers
26 views

is there a cubic or quartic approximation for these data points?

1 vote
1 answer
27 views

A question on Ray class groups and the relative degree of a prime

0 votes
0 answers
13 views

What is the difference between a knot and a plane curve?

-1 votes
0 answers
16 views

show that $L^2[a,b]$ is a hilbert space

1 vote
1 answer
80 views

Gompf's symplectic sum construction and symplectic involution of annulus

0 votes
1 answer
33 views

Computing relative homology by isolating smaller constituent SES

3 votes
1 answer
1k views

Adjoint of sum of two operators

2 votes
2 answers
217 views

Tautology, Valid, Contingent, Unsatisfiable, Contradiction: relationship?

2 votes
1 answer
18 views

Relating energy integral to the existence of a Frostman measure

1 vote
1 answer
29 views

Catching the numerator as a separate function in PARI

1 vote
0 answers
20 views

Finding rings of integers and computing class groups

1 vote
0 answers
26 views

Prove $\frac{x}{y^2}+\frac{y}{z^2}+\frac{z}{x^2}\geq x^3+y^3+z^3$ where $x,y,z>0$ and $x+y+z=3$.

2 votes
0 answers
40 views

Integrals of $q$-series

2 votes
1 answer
52 views

The sequence $(a_n), \ a_1=1, a_{n+1}=2+1/n+3/a_n$ converges

0 votes
0 answers
22 views

Find the probability that among four random digits there occur $3$, $2$, $1$ or $0$ repetitions.

0 votes
1 answer
19 views

Asymptotic expansion as $r\to 0^+$ for $ (2re^r -3(e^r-1))^2 $ using small o

1 vote
0 answers
13 views

Given two projections $E_1$ and $E_2$ with $degree(E_1) = degree(E_2)$, prove that E1 and E2 are similar projections.

2 votes
1 answer
45 views

Locally uniform convergence and interchangeable limits

5 votes
1 answer
82 views

Is there a combinatorial interpretation for a sum that includes $(-1)^k$?

0 votes
1 answer
20 views

Maclaurin series and basis

0 votes
0 answers
12 views

Computing the shape operator of a circular paraboloid?

2 votes
0 answers
15 views

The relation of the Bernoulli numbers to the Catalan numbers

0 votes
0 answers
23 views

Determining CDF of a function with variable inside absolute value

3 votes
1 answer
49 views

Gambler's Ruin: Expected time of ruin using martingale and stopping time

0 votes
0 answers
12 views

Approximate Binomial Distribution using normal distribution

1 vote
0 answers
13 views

Regarding Nagao's theorem about $GL_2(K)$

6 votes
2 answers
973 views

Strong definition of the radial Dirac delta function and its derivative

2 votes
1 answer
45 views

Determination of order of cosets in a factor group of a finite abelian group.

1 vote
0 answers
57 views

How to solve $e^{ax} + e^{b(x - t)} = 2$?

0 votes
0 answers
15 views

Check that $u(x,t)$ is solution of wave equation with special initial conditions.

0 votes
0 answers
13 views

Ultraweak topology on C$^{*}$-algebras

2 votes
0 answers
17 views

Is this pushforward measure also absolutely continous?

0 votes
0 answers
17 views

Fourier transform of a graph

0 votes
0 answers
13 views

Integral Inequality involving a binomial

6 votes
1 answer
172 views

1956 Miklos Schweitzer Counting - Problem 10

0 votes
0 answers
11 views

Proper menumonic for wirting out a 4th order tensor components

3 votes
0 answers
844 views

(Smirnov 1939) Paper: On the estimation of the discrepancy between empirical curves of distribution for two independent samples.

0 votes
0 answers
21 views

Leibniz Notation Clarification

1 vote
1 answer
35 views

Confusion about the first fundamental form?

0 votes
0 answers
14 views

Conditional Expected Value and Variance

-1 votes
0 answers
23 views

independent PDF multiplication of uniform distributions

7 votes
1 answer
458 views

Finding coefficient $a_{1996}$ if $\;\prod_{n=1}^{1996}(1+nx^{3^n})=\sum_{n=0}^m a_nx^{k_n}$

1 vote
1 answer
34 views

Can this algorithm for testing amicable numbers return false positives?

1 vote
2 answers
67 views

Solutions of the equation $x^2+1 = 0$

2 votes
1 answer
100 views
+100

FST and SND operations in language of elementary arithmetic.

4 votes
1 answer
147 views

Evaluate alternating double series

0 votes
0 answers
7 views

$\displaystyle \frac{h_a}{l_a} + \frac{h_b}{l_b} + \frac{h_b}{l_b} \leq \frac{\sqrt{3(p^2 + r^2 - 8Rr)}}{2R} + \sqrt{3\frac{2R - r}{2R}}$

0 votes
0 answers
31 views

What is an intuitive interpretation of the steps in the long division $\frac{1}{1+x^2}$?

2 votes
0 answers
22 views

If $\{f>a\}$ is measurable $\forall a \in \mathbb{Q}$ show that $f$ is measurable

1 vote
0 answers
24 views

Super-logarithmic scale?

8 votes
6 answers
347 views

Finding the value of $\lim_{a\to \infty}\int_0^1 a^x x^a \,dx$

0 votes
0 answers
14 views

does there exist a set of k positive integers such that each subset has a sum that is an nth power for some $n\ge 2$

0 votes
0 answers
18 views

Derivative of Dirac delta with respect to a parameter of a function

0 votes
0 answers
25 views

Smooth fundamental group of analytic variety

0 votes
0 answers
14 views

Special form of Fourier transform

1 vote
0 answers
15 views

Equivalent definition of Differentiability of function of two variable.

0 votes
0 answers
15 views

Cardinality of the set of internal sets

0 votes
0 answers
7 views

If we generate 10 uniform samples in sorted order and take the difference between the 9th and 10th samples?

1 vote
0 answers
35 views

How to compute $\lim\limits_{x\to 0} (-1)^{n+1} \frac{\int_0^x \frac{t^{2n+2}}{1+t^2}dt}{x^{2n+1}}$?

0 votes
0 answers
14 views

Is the hessian of the norm of a generic vector always positive definite?

0 votes
0 answers
59 views

Number of solutions for $x_1+x_2+x_3+x_4+x_5=23$ with odd and even variables

4 votes
0 answers
32 views

A finitely presented module over a finitely presented algebra

0 votes
0 answers
15 views

Can we show joint measurability of $(t,x)\mapsto(\kappa_tf)(x)$ for a Markov semigroup $(\kappa_t)_{t\ge0}$?

-1 votes
3 answers
112 views

Trouble finding the floor function of a given expression.

0 votes
0 answers
16 views

Stalk of inverse image sheaf

0 votes
1 answer
48 views

Prove that $\lim\limits_{\omega\rightarrow+\infty}\frac{\sin(\omega t)}{\pi t}=\delta(t)$ where $\delta(t)$ is the impulse function.

1 vote
1 answer
1k views

Constraints of a linear programming problem

Browse more Questions