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0 answers
3 views

The radius of convergence using root test

0 votes
1 answer
7 views

Convergence of Sequences with respect to Ultrafilters on the Natural numbers in Compact Hausdorff Topological Spaces

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0 answers
9 views

To find exponent of $1+J(F_2G)$ in GAP.

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1 answer
15 views

Clarification of a lemma in fundamental theorem of finite abelian groups

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0 answers
4 views

Signed Distance Functions into explicit representations?

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0 answers
12 views

Confused about a counting problem

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3 answers
1k views

Creating a parametric Equation when given the points of a collinear line?

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0 answers
39 views

A question related to the axiom of choice

-1 votes
0 answers
30 views

Given a function $f \le 0$ in 4-dim Euclidean space, suppose at the point where $f=0$, $\Delta f \neq 0$, why space $Ker(f)$ can't be 4-dimensional?

4 votes
0 answers
123 views

A generalization of Barrow's inequality

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0 answers
4 views

cooperative games, shapley and additivity

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0 answers
4 views

Are there well-established methods for the asymptotic analytical evaluation of Fourier series?

5 votes
1 answer
978 views
+150

On max-min representation for the principal eigenvalue of nonsymmetric elliptic operators

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0 answers
11 views

A little help with confidence interval estimation (for poker database analysis)

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0 answers
14 views

Is there a constant which realize this inequality?

0 votes
1 answer
3 views

Given Green's function, can I find the corresponding operator?

2 votes
1 answer
31 views

The distribution of $XY+(1-X)(1-Y)$ for $X,Y$ sampled uniformly from [0,1]

-1 votes
0 answers
19 views

How to "arrange things in groups"?

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0 answers
9 views

Is there a Baer's criterion for testing injectivity of sheaves of $\mathcal{O}_X$-modules?

2 votes
1 answer
78 views

Isomorphism $\mathbb Z[\omega]/(1-\omega)^2\cong (\mathbb Z/(p))[x]/(1-X)^2$, $\omega$ is the $p-$th root of unity.

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0 answers
9 views

Does there exist at least two sets whose union gives the universe in a certain intersection-closed family of sets?

1 vote
1 answer
17 views

Expectation of max of geometric r.v.

3 votes
1 answer
88 views

What is the mean of the stochastic differential equation $dX=K dt + \sigma X dW$ and how to find it?

1 vote
0 answers
6 views

Expected hitting time of 2-d brownian motion with $B_0 = (x_0, y_0)$

0 votes
1 answer
1k views

Convergence of $\sum_{n=1}^\infty \frac{\cos(3^nx)}{2^n}$

-2 votes
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57 views

Calculate the angle $x$ in the quadrilateral $ABCD$

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0 answers
7 views

The proof of asymptotic Giibert-Varshamov lower bound

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7 views

Proof Clarification: $f$ is convex iff it's convex when restricted to every line intersecting its domain

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18 views

How to prove this simple inequality based on convexity of $e^{x}$?

1 vote
1 answer
46 views

Sum $\sum_{n=0}^\infty x^n\sin(x^n),\quad x\in(-1,1)$

0 votes
1 answer
16 views

Probability apple is delicious given a red apple is produced in a green apple orchard?

0 votes
1 answer
32 views

Can the gamma function be generalized to quaternions and how?

-2 votes
0 answers
11 views

Real analysis (series) practice questions.

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0 answers
8 views

Recurrence formula of matrices

1 vote
0 answers
8 views

Card Game Opening Hand Calculator with subgroups

0 votes
0 answers
33 views

How to evaluate $\int_0^{\infty } \frac{\sin (\pi x)}{\log (x)} \, dx$

17 votes
1 answer
1k views

Exercise 1.24 from Joe Harris' Algebraic Geometry: First Course

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0 answers
5 views

Induced isomorphisms in rigid tensor categories.

0 votes
1 answer
33 views

Let $K$ be a field. If $f = \text{irr}(c_1;K) = \text{irr}(c_2;K) (c_1 \neq c_2)$ and $\deg(f)$ is odd, then $c_1 + c_2 \not\in K$

0 votes
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57 views

Assumption for maximum rank

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0 answers
11 views

Approximation of entropy of binomial distribution

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5 views

In statement of 'exact sequence of low degrees' for first quadrant spectral sequence.

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0 answers
20 views

What is the criteria to find out if a polynomial is irreducible?

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0 answers
7 views

Statistical methods to compare 21 theoretical values to experiments

1 vote
0 answers
13 views

Determine an order of $ab$ with $|a|=6$, $|b|=10$ where $a,b \in G$, a finite abelian group.

0 votes
1 answer
16 views

Wave Equation general solution on 1D

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0 answers
23 views

Finding the general convolution of probability function with hypergeometric PDFs.

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0 answers
18 views

Doubts on the procedure: convexity of a function

3 votes
0 answers
44 views

Precise Definition of Polynomial

0 votes
2 answers
11 views

What is the chance of two events happening after X attemps?

1 vote
0 answers
17 views

Criterion for cyclic groups in terms of its number of subgroups

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0 answers
25 views

Showing existence of symplectic transformations preserving a quadratic form

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0 answers
14 views

Converge of iterated average posterior to high entropy distribution

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0 answers
17 views

Proof of Morse Lemma

1 vote
0 answers
19 views

Missing argument in the proof of the Levy-Khintchine representation .

0 votes
0 answers
13 views

Introduction to the Binary Tetrahedral group and the 24-cell

-1 votes
0 answers
9 views

Abel summation on smooth piecewise function

0 votes
0 answers
20 views

Are equations of motion unique?

0 votes
0 answers
48 views
+50

Show that $A(C)$ is a vertical line or half circle orthogonal to $\mathbb R.$

4 votes
2 answers
149 views

Not enough degrees of freedom in Euler Lagrange equation

1 vote
0 answers
15 views

A stronger form of the weak basis theorem?

0 votes
1 answer
25 views

Which statement form is right?

0 votes
0 answers
14 views

Show that tangent spaces of surface are parallel to the z-axis

-2 votes
0 answers
35 views

Finding the Taylor Series for $f\left(x\right)=\frac{x}{e^{x}-1}$

8 votes
5 answers
1k views

Constructing the interval [0, 1) via inverse powers of 2

1 vote
1 answer
127 views

Find sum of factorials divisible by the largest possible prime squared

0 votes
1 answer
32 views

Linear Algebra about projection matrix question

0 votes
1 answer
32 views

Variable transformation in the definite integral

2 votes
1 answer
27 views

Decomposing multidimensional matrices into contraction of 2-dimentional matrices using the singular value decomposition.

0 votes
0 answers
12 views

What is this set? Unknown baire generic set

0 votes
1 answer
33 views

Simple proof that John's theorem is sharp?

1 vote
0 answers
44 views

Convergence of a recursively defined array.

1 vote
0 answers
45 views

Gerschgorin Circle Theorem and ordering of eigenvalues

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0 answers
44 views

How do you prove that a specific shape in a regular octagon is a rectangle?

0 votes
0 answers
18 views

How to get the following estimate of integral invoving Airy function

-1 votes
1 answer
21 views

Probability - Find the expected number of item throws into N containers until one of the container reaches k items

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0 answers
9 views

Looking for an identity to simplify an infinite sum involving hypergeometric 2F1's

0 votes
0 answers
16 views

How do you find the end point of an arc with a non - zero starting angle in cartesian coordinates.

0 votes
0 answers
7 views

Relation of twisted graded modules and twisted sheaves

10 votes
3 answers
551 views

Equalizers in CRing

3 votes
0 answers
85 views

AM-GM inequality for non necessary positive numbers

3 votes
0 answers
162 views

Which 2nd root finding method does the HP32E use to compute $Q^{-1}$?

0 votes
0 answers
65 views

Looking for citation of a definition of multivariable integral

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0 answers
9 views

How to interpret optimization performance indicator metrics

1 vote
0 answers
13 views

Non-parametric and parametric statistical manifolds: Equivalence of score functions in tangent spaces

1 vote
0 answers
23 views

Multiplicity of bilateral shift on a Banach space

1 vote
0 answers
23 views

Exercise 11.1 in Algebraic Combinatorics by Stanley

1 vote
0 answers
27 views

Velocity vector vs Matrix Differential

4 votes
1 answer
85 views

Asymptotics of $\int xdx ~ f(x) J_\nu(x) J_\nu(\alpha x)$ type integral for $\nu \to \infty$

4 votes
0 answers
85 views

When are universal monomorphisms effective?

1 vote
0 answers
5 views

Does maximal contact hypersurface (m.c.h.) exist for any curve over a field of arbitrary characteristic, and if so, for what definition of m.c.h.?

-2 votes
0 answers
17 views

How to read symbol and understand equivalent measure for a measurable space

-3 votes
0 answers
12 views

Is the Riemann Liouville fractional integral compact operator?

4 votes
1 answer
78 views

Sum of reciprocal Bernoulli numbers

11 votes
2 answers
3k views

Sampling, Fourier Transform, and Discrete Fourier Transform

13 votes
3 answers
44k views

In a ring, how do we prove that $a \cdot 0 = 0$?

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