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0 votes
0 answers
5 views

tiles and their composition with coherent condition

2 votes
3 answers
119 views

Prove the limit $\lim_{(x,y)\to(0,0)} x^y (x>0)$ doesn't exist

4 votes
1 answer
71 views

Given $33$ numbers in $]0, 1[$, two of them satisfy $0<ab(a-b)<\frac{1}{99}$.

3 votes
2 answers
125 views

In Pinter's - A Book of Abstract Algebra: Second Edition, chapter 14, exercise G6, is $f$ assumed to be surjective? Use of the word into/onto

1 vote
4 answers
108 views

Boundary value problems vs initial value problems in ordinary differential equations, why is the math so different?

5 votes
1 answer
738 views

Can we rotate a 3D lattice of deformed spheres?

0 votes
0 answers
32 views

If we know that $y=\int_1^x \frac{1}{t} dt$ then why is $x=e^y$ the inverse function of $y$?

5 votes
2 answers
256 views

Total curvature and Stokes' theorem on the hemisphere

1 vote
1 answer
25 views

Infinite Grid Tiled by L-Tetrominoes: Construct 16 More Disjoint Tilings

3 votes
2 answers
1k views

Geometric Interpretation of Cauchy-Schwarz Inequality for $n= 2,3$

0 votes
2 answers
120 views

evaluate $\lim_{(x,y)\to(0,0)} \frac{\sin(x^2y+y^2x)}{xy} $

-1 votes
1 answer
41 views

Confusion of Discrete and Continous random variables relating to time

44 votes
3 answers
1k views

Possible distinct positive real $x,y,z \neq 1$ with $x^{(y^z)} = y^{(z^x)} = z^{(x^y)}$ in cyclic permutation?

5 votes
1 answer
1k views

If $f\in A_k(V)$ and $g\in A_l(V)$ show $i_v(f\wedge g)=i_vf\wedge g+(-1)^kf\wedge i_vg$ - I've got the gist, not sure how to write

3 votes
1 answer
128 views

Is a covering normal if and only if its monodromy group is isomorphic to its deck group?

5 votes
4 answers
2k views

Geometric Interpretation of the Cauchy-Schwarz Inequality

3 votes
1 answer
72 views

Do geodesics actually minimize the curvature?

4 votes
1 answer
156 views

Sufficient conditions for knot quandle homomorphisms

0 votes
1 answer
125 views

Convergence of this product

4 votes
1 answer
453 views

How do we interpret the group structure of the ideal class group?

3 votes
2 answers
294 views

Quasi-perfect numbers , i.e. numbers equal to the sum of their nontrivial divisors.

0 votes
3 answers
589 views

Incalculable Symbol

6 votes
7 answers
477 views

Evaluate this definite integral: $\int_{1/4}^{3/4}\cos\left(2\cot^{-1}\left(\sqrt{\frac{1-x}{1+x}}\right)\right)dx$

7 votes
3 answers
473 views

Fourier transform of $1/|k|^4$ in 2d

5 votes
1 answer
585 views
+50

Probability of forming a quadrilateral from a stick with $n$ breaks

39 votes
9 answers
34k views

Galois group of $x^3 - 2 $ over $\mathbb Q$

0 votes
0 answers
29 views

Fiber product of categories

7 votes
1 answer
204 views

Piecewise functions in constructive mathematics

0 votes
1 answer
82 views

Direct Parameterization on Contour Integrals

8 votes
4 answers
203 views

Find the sum of all real roots of $x+\frac{x}{\sqrt{x^2-1}}=2022.$

0 votes
0 answers
13 views

Derive continuous random walk equation from probability combination

4 votes
2 answers
122 views

When is $\log{f(z)}$ analytic?

5 votes
1 answer
589 views

Are $C$ and $C\times C$ homeomorphic?

0 votes
0 answers
26 views

Prove the non-negativity of a Geometric Brownian motion

3 votes
2 answers
188 views

Solution to $\frac{n(n+1)}{2} \leq x<\frac{(n+1)(n+2)}{2}$ when given $x$

0 votes
0 answers
34 views

Understanding nonuniqueness of graph game given Sprague-Grundy Function

3 votes
1 answer
53 views

The magnitude of the vector area is always less than or equal to the scalar area, with equality holding if and only if the surface is flat?

0 votes
0 answers
41 views

Reference request: Klein foams equipped with a finite group action

0 votes
0 answers
31 views

Conditioning twice a Gaussian, where one is with a zero-probability event

1 vote
1 answer
574 views

How to find the Cosets of a Polynomial group

0 votes
1 answer
157 views

Counting problem for V-tromino pattern

3 votes
0 answers
68 views

The formal affine line is an etale stack!

3 votes
0 answers
53 views

A good cover for $P^2\mathbb{C}$

0 votes
0 answers
23 views

Choosing coordinate chart whose coordinate fields match vector field

-1 votes
0 answers
107 views

Hyperbola arc length derivation?

1 vote
1 answer
573 views

Applications of coupled systems of $\;2\times 2\;$ linear differential equations

6 votes
3 answers
1k views

Diophantine equations and Hilbert's 10th Problem, how did MRDP do it?

13 votes
1 answer
523 views

A little unknown test for convergence of series with positive terms

84 votes
7 answers
16k views

Can someone explain the Yoneda Lemma to an applied mathematician?

7 votes
2 answers
579 views

Existence of a function whose derivative of inverse equals the inverse of the derivative

86 votes
6 answers
139k views

What exactly is Laplace transform?

8 votes
4 answers
10k views

Show that the area vectors for a general tetrahedron sum to zero

13 votes
2 answers
340 views
+50

Is there a natural number for which all the sums and differences of its factor pairs are prime?

0 votes
2 answers
101 views

What are some examples of applications of harmonic analysis to real world problems?

0 votes
0 answers
54 views

Why would it be useful to view a topological space as a bundle?

6 votes
1 answer
687 views

Intuitive reason why SO(3) is not isomorphic to the sphere

5 votes
3 answers
513 views

Why is $s''$ needed in $s''(rs'-r's)=0$ for equivalence of fractions in localizations

4 votes
4 answers
251 views

If the triangle formed by the endpoints of bisectors of $ABC$ is isosceles, is $\triangle ABC$ isosceles?

1 vote
0 answers
168 views

About proof by contradiction of Morley's theorem in Euclidean geometry

0 votes
1 answer
127 views

A combinational circuit: A case of mathematical triviality vs physical implementation

2 votes
2 answers
269 views

Help needed in solving the partial differential equation $a^2z+\frac{\partial^2z}{\partial x^2}-\frac{\partial^2 z}{\partial y^2}=0$

0 votes
1 answer
22 views

Irreducible representations of a direct sum of cyclic groups

3 votes
2 answers
192 views
+50

Injectivity and Surjectivity of this map

8 votes
0 answers
704 views

Tool that draws Venn diagram from subset relation

2 votes
1 answer
103 views

Space filling constructions for higher dimensions of the domain

2 votes
1 answer
164 views

Is it possible to transform RSA (factoring) to SAT in polynomial time?

2 votes
1 answer
161 views

Question about round-robin tournament winning probabilities given first round results

-1 votes
0 answers
21 views

Using a connection to differentiate velocity vs jet bundle approach?

3 votes
2 answers
123 views

Evaluating $\frac{1}{\sqrt{2g}}\int_0^1\sqrt\frac{4x^2+1}{x^2+C} dx$ and $\frac{1}{\sqrt{2g}}\int_0^1\sqrt\frac{4x+1}{4x(\sqrt{x}+C)}dx$

0 votes
0 answers
25 views

Action of group scheme $G$ on vector bundle $\mathbb V(M)$ compatible with scaling. Is it automatically linear?

3 votes
1 answer
112 views

Right notion of $G$-equivariant $A$-modules which is equivalent to $G$-equivariant quasicoherent sheaves over $X=\operatorname{Spec} A$.

0 votes
1 answer
566 views

Is the closed span itself a hilbert space?

1 vote
3 answers
207 views

Is it possible to calculate these dimensions in red (points along an arc)

1 vote
1 answer
321 views

Parametrizing a counterclockwise spiral

1 vote
0 answers
59 views

What is the purpose of delta t in the proof of the chain rule case I?

2 votes
0 answers
35 views

Pointwise inequality to fourier inequalities

0 votes
0 answers
17 views

Triangulating a compact connected topological surface and topological properties

0 votes
0 answers
125 views

$4$ or more type $2$ implies $3$ or less type $1$

8 votes
1 answer
1k views

Difference between elementary submodel and elementary substructure

1 vote
0 answers
53 views

Proving L’Huilier’s formula

1 vote
1 answer
697 views

Boundary of Delaunay Triangulation is the convex hull of sites

1 vote
0 answers
28 views

Proof of a fact about adjunctions of presheaves

1 vote
1 answer
35 views

Criteria for locally finite CW complex

3 votes
0 answers
66 views

Equivalence of facts about Čech cohomology on a site

1 vote
0 answers
54 views

Can product of one parameter subgroup in SE(3) be viewed as a subgroup in SE(3)

0 votes
1 answer
32 views

equivalent of a sequece deduced from a sequence fastly decreasing to $0$

5 votes
1 answer
419 views

Understanding Proof of Talagrand's Inequality

2 votes
0 answers
20 views

Determining a unitary representation of $\widetilde{\mathrm{SU}(1,1)}^2$ from its restriction to the maximal compact subgroup.

5 votes
1 answer
109 views

How many points at infinity does a Riemann surface have?

2 votes
0 answers
70 views

$d \mid (p− 1)$ means $ x^d \equiv 1 \pmod p $ has exactly $d$ incongruent solutions

4 votes
4 answers
447 views

Showing that a triangle satisfying $\cot A+\cot B+\cot C=\sqrt3$ must be equilateral

8 votes
1 answer
843 views

Joint distribution of Brownian motion and its running maximum when time is different

2 votes
1 answer
58 views

How does one test whether a positive integer is semiperfect in Wolfram Alpha?

0 votes
0 answers
78 views

Constructing an isomorphism for $\eta^2\oplus1\cong\eta\oplus\eta$

5 votes
2 answers
201 views

About $\int_0^{\pi/2}\cos^n(x)\sin((n+k)x)\,dx$ and a sequence of polynomials

1 vote
1 answer
25 views

Diameter of a $P$-hull when closed balls are $P$-sets

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