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0 answers
6 views

Mass conservation for a transport equation in mild form

0 votes
0 answers
11 views

How many elements commute in S_4?

0 votes
0 answers
8 views

Finitely generated k-Algebra

0 votes
1 answer
15 views

solution-verification | Find the minimum of the expression $E(x)= \frac{-2x^4+8x^3-8x^2-9}{x^4-4x^3+4x^2+3}$

0 votes
0 answers
5 views

Probability the angle with a random point on a rectangle as its origin is obtuse

2 votes
0 answers
10 views

Possible indices of finite index subgroups of $SL_2(\mathbb{Z})$

1 vote
1 answer
38 views

Finishing the proof of the triangle inequality of Hausdorff metric

13 votes
1 answer
160 views

Let $F_\infty=\bigcup_{n\geq1}\operatorname{Q}(2^{1/2^n})$ , $K_\infty=\bigcup_{n\geq1}\operatorname{Q}(\zeta_{2^n})$, what is the intersection?

4 votes
1 answer
139 views

Set theories with unrestricted determinacy

6 votes
1 answer
286 views

All games determined + ZF inconsistent

3 votes
1 answer
2k views

How are these Newell's method implementations for surface normals equivalent?

3 votes
1 answer
87 views
+50

Problem 237 "Mathematical Quickies:270 Stimulating Problems with Solutions" Particle Movement

2 votes
1 answer
84 views

Gaussian map and curvature for a sphere

0 votes
0 answers
6 views

How can both the Čech complex and the alpha complex have the same homotopy type as the union of balls if they are constructed differently?

0 votes
0 answers
23 views

Proof of $f(\overline{S}) = \overline{f(S)}$

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0 answers
10 views

Find compactification of $\mathbb{R}$ which has a subset homeomorphic to $\mathbb{R}^2$

0 votes
0 answers
8 views

Redundancy in the definition of uniform spaces

2 votes
1 answer
46 views
+50

What is the fundamental group of the space $X_n=SL(n, \mathbb{R})/SL(n, \mathbb{Z})$

0 votes
0 answers
8 views

Orthogonal complement with respect to a subspace, and then with respect to the larger space.

0 votes
0 answers
41 views

Book recommendation for mathematical physics

1 vote
0 answers
9 views

Clarify on Propositions 3.36 and 3.38 in Qing Liu's algebraic geometry book

0 votes
1 answer
74 views

Area inside infinitely inscribed regular polygons

0 votes
0 answers
7 views

7-point North-East ILU decomposition

5 votes
0 answers
133 views
+50

Is there a non-trivial arithmetic progression of positive integers such that every number contains the digit $2?$

0 votes
0 answers
23 views

Can any open set in $\mathbb{R}^d$ be countably union of closed sets

1 vote
1 answer
24 views

Minimizing $\|Ax-b\|$ given that x can only take values 0 or 1

1 vote
0 answers
11 views

Example of non supersingular Weil number

4 votes
1 answer
107 views

Prove that sequence $(a_n)_{n\geq 1}$ is not convergent.

-1 votes
0 answers
12 views

For $\overline{\{\xi \}} = X'\subseteq X$ with $\xi \in S \subseteq X$, $\{\xi\}$ is dense in $S \cap X'$?

1 vote
1 answer
55 views

Shouldn’t $0$ to any power be undefined?

0 votes
0 answers
22 views

How can we construct reals from Cauchy sequences if the definition of Cauchy makes uses reals?

0 votes
0 answers
20 views

Packing tiny open sets into a large open set

1 vote
1 answer
25 views

The "Euler Product formula" for general multiplicative functions

2 votes
2 answers
2k views

Variable refractive index question

8 votes
2 answers
5k views

Integration of $1/x$ as a Riemann sum

0 votes
0 answers
14 views

Closed complex hypersurfaces of complex manifolds

0 votes
0 answers
16 views

Problems with non prime order diagonal latin squares

3 votes
2 answers
66 views

Reference for $\int_{-\infty}^{\infty}e^{a x^4+b x^3+cx^2}dx\;$?

0 votes
1 answer
55 views

Find a sequence function for combinatorial sequences

1 vote
0 answers
30 views

Given is the system of equations, solve using numerical methods

1 vote
1 answer
1k views

Number of ordered, unlabeled binary rooted trees with n nodes and k leafs

0 votes
0 answers
46 views

Maximum and concavity of function

0 votes
1 answer
35 views

Which is the right option for this question

0 votes
0 answers
16 views

Let $\alpha_{ij}=\lim_{n\to\infty}\frac{1}{n}\sum_{m=1}^{n}~p_{ij}^m,~~i,j\in S.$ Show that above limit exist.

0 votes
1 answer
32 views

the infinite category constructed from a model category has all limits and colimits

0 votes
1 answer
25 views

Conjecture on odd numbers producing (semi) primes

1 vote
1 answer
16 views

The polynomial $ f_1 = -xy^2 z^2 + z^8 + 6x^3 y + 2y^4 z $ with variable order $ x > y > z $ should be sorted

0 votes
1 answer
3k views

How many different combinations of $18$ numbers can be made from $136$ numbers?

0 votes
0 answers
8 views

Help with this step in Calderon-Zygmund decomposition

1 vote
0 answers
31 views

How to expand $(D_\mu\Phi)^\dagger(D^\mu\Phi)$ in $SU(2)$

3 votes
0 answers
140 views

Closed form for $\sum_{k=n}^{2n-1} k(-1)^k \sum_{i=k}^{2n-1} {2n \choose i+1} {i \choose n}$?

0 votes
0 answers
9 views

Onsager conjecture and properties of Besov Spaces

3 votes
0 answers
49 views

What is $\min\{ m+k\}$ such that $ \binom{m}{k}=n$?

0 votes
0 answers
29 views

Trigamma-free Negative Binomial regression: doubts on Hessian and Fisher Information Matrix in the dispersion parameter

2 votes
2 answers
52 views

Finding limit of spectral radius to size ratios on a sequence of symmetric matrixes increasing in dimensions

0 votes
1 answer
18 views

Radius of balls in estimates for De Giorgi method

1 vote
0 answers
13 views

Write the system that has trajectories on the same curves as the above system, but oriented in the opposite direction.

1 vote
0 answers
21 views

Diving $m$ pizzas among $n$ students

1 vote
0 answers
17 views

Prove that conjugation $\tau_2: z \mapsto \overline{z}$ is an automorphism of the real algebra $\mathbb{C}$.

0 votes
0 answers
18 views

For any ring R, there exists a unique ring morphism from $\mathbb{Z}$ to R. Prove that $\mathbb{Z}$, is the only ring with this property.

0 votes
1 answer
37 views

What exactly does the constants imply/mean in a regression analysis?

0 votes
0 answers
15 views

Three things to show in $\sum_{n=0}^{\infty}\sum_{k=0}^{\infty}A_nB_k$

2 votes
1 answer
2k views

Orthogonality constraints when formulating SVD as optimization problem

4 votes
0 answers
27 views

Is there a compact form of $\frac{2}{n+1}\sum_{k=1}^n\frac{\sin^2(\pi jk/(n+1))}{z-2\cos(\pi k/(n+1))}$ in terms of $z$, $n$, $j$?

4 votes
2 answers
118 views

Prove that $\sup⁡(A\cup B)=\max\{\sup⁡(A),\sup⁡(B)\}$

2 votes
1 answer
47 views

Given is the system of differential equations

0 votes
0 answers
20 views

Let $J$ be an ideal that defines the entire polynomial ring over the field $\mathbb{R}$ ($J = \mathbb{R}[x, y]$)

2 votes
1 answer
78 views

Using the residue theorem to compute two integrals

1 vote
1 answer
21 views

Regarding the characteristic of field extension of residue fields

1 vote
0 answers
11 views

Derivative of $f \in BV_{loc}(\mathbb{R})$ with $f =0$ a.e.

0 votes
0 answers
13 views

Let $R$ be a ring and $M$ a (left) $R$-module.

0 votes
0 answers
22 views

A special identity relating poisson integral for L^2 boundary condition

0 votes
0 answers
8 views

Factorial cumulants of stochastic process

0 votes
0 answers
17 views

Let $\varphi: K_1 \rightarrow K_2$ be a ring homomorphism and $M$ a left $K_2$-module.

0 votes
0 answers
4 views

Spinors on (euclidean signature) spacetime

4 votes
1 answer
192 views
+500

Probability of two independent random variables are equal decreases when they are more spread out

0 votes
0 answers
11 views

Solve the system using the midpoint method with a step size of $0.25$ for $ 0 \le t \le 0.5 $

3 votes
1 answer
61 views

Geometric Intuition Behind a Covering Space

2 votes
0 answers
32 views

When are universal monomorphisms effective?

0 votes
0 answers
21 views

Total space of the frame bundle always an almost complex manifold in $dim >2$?

0 votes
0 answers
17 views

Variance of asymptotic Travelling Salesperson Problem

3 votes
0 answers
41 views

How to prove $\sum_{n=0}^\infty (-1)^n f_n=-\frac{1}{2i}\int_{c-i\infty}^{c+i\infty}\frac{f_z}{\sin(\pi z)}dz$ in the sense of Borel summation?

0 votes
0 answers
17 views

Force of a tensioned rope on an obstructing block.

1 vote
0 answers
15 views

Visualization of skew-symmetric rank-2 tensor fields

1 vote
0 answers
12 views

The sum of independent martingales

6 votes
4 answers
97 views

$\frac{1}{x} + \frac{1}{x-1} + \ldots + \frac{1}{x-n} = 0$ has only one root $(0;1)$

-2 votes
0 answers
21 views

Monotony of functions

0 votes
0 answers
23 views

Skewed Guessing Game

1 vote
2 answers
2k views

How to use class equation for determining the center of $S_4$

0 votes
3 answers
167 views

Choosing a random integer from all the natural numbers.

1 vote
1 answer
21 views

Confirmation of approach for conditional probability question

-1 votes
2 answers
122 views

What is the sign of $I_n = \int _{0}^{1}\frac{x^{2n+1}}{x^{2}+1}dx$

1 vote
1 answer
4k views

Find the solution set to the corresponding homogeneous system of equations

1 vote
0 answers
19 views

How does this optimal x change with this parameter?

-1 votes
0 answers
45 views

Numerically solved PDE of Ornstein–Uhlenbeck process on 2-Simplex violates conservation of probability

0 votes
0 answers
147 views

Approximating a discrete distribution with CLT

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