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
22 views

Bertini's Theorem induces holomorphic mapping

0 votes
0 answers
26 views

Min-max principle for eigenvalues in 1d elliptic problem

-1 votes
0 answers
12 views

Which State Will the Markov Chain Go To Next?

0 votes
0 answers
5 views

Find the normal subgroup $N$ if $G = S_3$

-1 votes
1 answer
15 views

Linear differential equation of the second order with a regular singular point

0 votes
1 answer
17 views

Find the PDF of $\frac{X}{Y^{2}}$ for the given intervals of the random variables.

0 votes
0 answers
4 views

Estimate a parameter that is not in a PDF, makes sense?

0 votes
0 answers
4 views

sub-additivity of outer measure when the sum of outer measures is infinite

2 votes
0 answers
19 views

How to set up Chern-Simons theory, compute its "topological gauge shift" term, and show its quantum path integral is topological?

1 vote
2 answers
40 views

Surface Integrals for Calculating Volume

0 votes
2 answers
1k views

Establish the composite Simpson's 3/8 rule from basic Simpson's 3/8 rule over n subintervals and the error

4 votes
1 answer
15 views

Need Help in Reasoning with Extremal Points

3 votes
1 answer
42 views

Deriving the logarithm of negative numbers

-1 votes
0 answers
6 views

Determine $a$ and $b$ such that tangent plane be horizontal

-1 votes
1 answer
14 views

LU decomposition and the connection with binary quadratic form

2 votes
1 answer
50 views

How to write down a loop on $\mathrm{Diff}(\mathbb{S}^2)$ concretely?

1 vote
0 answers
36 views

Is every large enough odd integer the sum of a prime or prime power and a power of $2$?

3 votes
0 answers
7 views

Does Stochastic Integral have a density

0 votes
0 answers
23 views

Solving the following set of quadratic equations ...

4 votes
1 answer
63 views

$P(x)$ is odd-deg polynomial with real coefficients. Show using Induction that $P(P(x))=0$ has atleast as many distinct real roots as the $P(x)=0$.

0 votes
0 answers
9 views

Continuous functions "send neighboring points into neighboring points"

2 votes
2 answers
22 views

balls and bins when maxload $\geq 3$

0 votes
1 answer
21 views

expectation of women sitting next to at least one man

0 votes
0 answers
10 views

$L_2$ norm for matrix of funtion

-3 votes
0 answers
9 views

how many triangles here?

0 votes
0 answers
5 views

Fourier inversion of a certain mean

0 votes
1 answer
13 views

Simple linear regression without intercept finding estimator for Beta in a matrix form

-2 votes
1 answer
27 views

Solving second-order nonlinear differential equation $y''y+5y^6(y')^4=2(y')^2 $

1 vote
1 answer
34 views

Hasse-Minkowski and Rational Solutions to General Quadratic Polynomials

0 votes
0 answers
21 views

Find the maximum value of $k$.

2 votes
1 answer
20 views

Extending the closed unit ball in an open set

0 votes
1 answer
9 views

Reciprocal of midsegment (midpoint) theorem proof

1 vote
1 answer
25 views

Is prime spectrum the soberification of maximal spectrum?

1 vote
0 answers
37 views

Spivak: Show that $f(kx+(1-k)y)<kf(x)+(1-k)f(y)$ whenever $k$ is a rational number, between $0$ and $1$, of the form $\frac{m}{2^n}$.

6 votes
0 answers
152 views
+250

For which values of $q$ is $\int_{\mathbb{R}^{2N}}\frac{|u(x)-u(y)|^q}{|x-y|^{N+sq}}dxdy$ is finite?

1 vote
1 answer
38 views

Unique Haar measure on quotient is pushforward

0 votes
0 answers
7 views

Where am I wrong on the following Bayesian relations?

0 votes
0 answers
19 views

How to solve this trigonometrical differential equation?

0 votes
1 answer
16 views

Chain rule for derivative of matrix-valued function

0 votes
0 answers
9 views

How are H-infinity norm and L-1 norm related?

-1 votes
1 answer
18 views

Exercise on Linear Transformation

-1 votes
0 answers
11 views

Hermite quadrature approximation

2 votes
0 answers
17 views

How to find the enveloping curve of this family of polynomials?

0 votes
0 answers
20 views

Measure based Probability arising in a simple question

0 votes
0 answers
15 views

How to construct the Green's function solution for the barotropic Rossby wave eq with Dirichlet b.c.?

0 votes
0 answers
13 views

$F$ is heavy-tailed if and only if $\overline F$ is heavy-tailed

0 votes
1 answer
21 views

Is it possible to find the value of $n$ in the inequality $An^{-a}+Bn^{-b}+Cn^{-c}\leq1$ with $n, a, b, c\in \mathbb N$

0 votes
1 answer
14 views

Question about direct sum of tangent spaces.

0 votes
0 answers
10 views

The essential numerical range of $\lambda I+T$ is a one-point set

0 votes
1 answer
28 views

Diagonalizable linear operators and invariant subspaces.

0 votes
0 answers
9 views

Should I use all data to make predictions in least square method or would it be better part of the data?

-2 votes
0 answers
19 views

Suppose $M$ is a monoid and $a\in M$. Show that $a$ is the inverse of an element when and only if $\exists x\in M$, such that $axa = 1$

1 vote
1 answer
15 views

Factorization of rank one operators in $A \otimes B(H)$

4 votes
2 answers
196 views

Is there an elementary proof for $\int_{0}^{\infty} \frac{d x}{x^{n}+1}= \frac{\pi}{n} \csc \left(\frac{\pi}{n}\right) $

0 votes
1 answer
25 views

Global minimization Problem for $f(x) = \frac{|| Ax+b||^2}{c^Tx+d}$

1 vote
0 answers
19 views

Unitors in star-autonomous categories

0 votes
0 answers
4 views

Law of $\sup_{s \geq 0} X_s$ for $X$ a Lévy process with derive

2 votes
2 answers
46 views

A better lower bound for $f(t):=((t-a)^2+b)^2+d(t-c)^2$ on $[0,\infty[$ where $a,b,c,d>0$ and $c>a$

0 votes
0 answers
17 views

Is $A-PAP$ positive-semidefinite?

0 votes
1 answer
16 views

How to combine various measures into a single measure?

0 votes
0 answers
14 views

classifying closed subschemes of an affine scheme

0 votes
0 answers
21 views

Finding the tightest (smallest) triangle that fits all points

0 votes
0 answers
11 views

Outer automorphism of the Lie group $\mathrm{SL}(2,\mathbb{C})$

0 votes
0 answers
7 views

Which name receives this "pulled-back" sheaf?

0 votes
0 answers
17 views

Diagonalizing a matrix that is close to a circulant one in symmetry

0 votes
0 answers
9 views

I have a Variation of Calculus, Euler Lagrange, Lagrange Multiplier problem and I don't know how to continue.

0 votes
0 answers
7 views

Adjunction formula in Griffiths Harris

0 votes
0 answers
14 views

Equivalent definitions of simplicial homotopy

0 votes
1 answer
23 views

Determine a linear approximation of $f$ where $z=f(x,y)$ and $e^{z} = xyz$ at $(e^{2}, 1/2)$

2 votes
1 answer
40 views

Solving equation $A^TX + X^TA = B$ respect to $X$

1 vote
0 answers
19 views

When does the automorphism group of a Lie Group equal to the automorphism group of its Lie Algebra

0 votes
1 answer
72 views

Solution check: $e^{\cos x}=\sum_{n=0}^{\infty}{a_nx^n}$, determine $a_n$ for $n\leq 5$, does this solution make sense?

0 votes
0 answers
24 views

Using the Strong Law of Large Numbers to prove this result

0 votes
1 answer
29 views

Product of First primitive roots equal to 1001

1 vote
1 answer
29 views

Matrix-vector norm inequalities in tridiagonal matrix

1 vote
0 answers
35 views

Does Strict Well-Ordering Indicate Existence of a Unique Least Element for All Nonempty Subsets of the Same "Open Lower Bound"?

8 votes
1 answer
437 views

Prob. 8, Chap. 5, in Rudin's PMS, 3rd ed: If $f^\prime$ is continuous on $[a, b]$, then $f$ is uniformly differentiable on $[a,b]$

0 votes
0 answers
12 views

Variance of a random variable given a statement about some limit

3 votes
1 answer
26 views

Group/H-space structures for standard models of classifying spaces?

0 votes
0 answers
17 views

Is there a function or equation that can trace the trajectory of a space rocket's motion on the three coordinate axes (x ,y ,z)?

0 votes
0 answers
13 views

A follow up to a previous question on peano structures

1 vote
0 answers
15 views

4 node random graph, what is the probability that there will be zero triangles

0 votes
0 answers
5 views

Estimating two unknows from a set of linear equations

0 votes
0 answers
6 views

Geometry problem inspired by Babylonian tablets (positive matrix factorization)

3 votes
0 answers
39 views

Is $\mathbb{Z}[ \alpha ]$ Noetherian for $\alpha \in \mathbb{C}$?

0 votes
0 answers
14 views

Construction of invariant subspaces

0 votes
0 answers
6 views

coefficient of poles of meromorphic function on a Riemann surface does not depend on the local coordinate

0 votes
0 answers
18 views

If Complex Numbers Describe a Circle and Split-complex Numbers Describe a Hyperbola, Can One Make a Hypercomplex Number System to Describe any Shape?

0 votes
0 answers
4 views

Support functions for a general $p$ norm ball

2 votes
0 answers
45 views

Let $H\subseteq G$ with $M\lhd H$ and $H\cap H^x\subseteq M$ when $x\notin H$. Show there exists $N\lhd G$ with $NH=G$ & $N\cap H=M$

0 votes
0 answers
6 views

Solving the convolution equation $U*g=\sin{2x}$ where $g(x)=e^{-|x|}$.

3 votes
4 answers
111 views

Evaluating $\frac{1!+2!+\cdots +40!}{41!}$

0 votes
0 answers
13 views

Modified Balls in Bins Game Theory Problem

0 votes
0 answers
10 views

Direct sum of two additive groups with different modules

1 vote
1 answer
20 views

Split Bregman Algorithm for L1 optimization

1 vote
1 answer
14 views

Let $\{E_k\}$ be a sequence of measurable sets in X. Show that $A\in\mathfrak{M}$, where $A$ is the set of all x that lie in infinitely many $E_k$'s.

Browse more Questions