Skip to main content

Explore our questions

Score of 41
1 answer
931 views
+500

Topological space where any finite, but not every countable, intersection of compact subsets is compact

Score of 0
1 answer
63 views

Eight points in a unit cube, separated from each other by more than or equal to one unit

Score of 2
3 answers
297 views

What is the value of $\int_0^1 \ln\{\ln x\} dx$

Score of 0
0 answers
5 views

An example of a nonfinitely based but independently based magma.

Score of 0
0 answers
9 views

Uniqueness and Universality of Ring $W_n(K_s)$ of Trunicated Witt Vectors in generalized Kummer Theory

Score of 0
0 answers
8 views

Are strongly idempotent magmas a variety or at least a quasivariety?

Score of 1
3 answers
84 views

2nd order homogenous linear ordinary differential equation, finding a second solution given an existing solution,Wronskian.

Score of 6
3 answers
156 views

Proving $n^{3}-n-3$ is never a perfect square.

Score of 2
1 answer
325 views

How to compute the expected standard deviation of a multinomial distribution?

Score of 2
0 answers
11 views

Are these the only two uniquely determining equational identities?

Score of 2
3 answers
763 views

Circle touching a given line at a point

Score of 0
2 answers
1909 views

Rectangle divided into smaller rectangles

Score of 0
0 answers
6 views

Convergence behavior and normalization anomalies of a discrete curvature operator with exact Gauss-Bonnet

Score of 0
0 answers
9 views

Is there a notion of alternating monoidal category/multicategory/operad?

Score of 0
2 answers
17 views

Subset of periodic functions is not subspace of $\mathbb{R}^{\mathbb{R}}$ - closure under scalar multiplication

Score of -2
3 answers
161 views

Show that if $A \setminus B \subseteq C$ and $A$ is not a subset of $C$, then $A$ and $B$ are not disjoint.

Score of 0
1 answer
26 views

Number of acquaintances, given conditions about common acquaintances

Score of 2
1 answer
537 views

Proof of Projective Nullstellensatz

Score of 4
1 answer
553 views

Doubt in a proof on projective varieties from Hartshorne

Score of 7
1 answer
4608 views

Projective Nullstellensatz

Score of 0
0 answers
32 views

What role do manifolds play in algebraic geometry?

Score of 12
1 answer
496 views

Algebraic integration. Is integration by parts equivalent to the multiplicativity of the exponential?

Score of 1
0 answers
15 views

Is the notion of a countable Hamel basis useful?

Score of 5
0 answers
61 views

Magician-assistant coding strategy on a binary sequence of length $2^{2025}$.

Score of 11
2 answers
616 views

Recent counter-examples to Euler's Sum of Powers conjecture?

Score of 0
1 answer
551 views

Conditional probability with complementary events

Score of 0
0 answers
18 views

Rotation invariance of the Laplacian $\Delta$ under a transformation of a differential operator

Score of 0
0 answers
10 views

Checking a denominator formula for same-orientation digit-step shells in length-six repetends

Score of 0
0 answers
51 views

Help needed to understand the proof of Projective Nullstellensatz

Score of 2
3 answers
604 views

Particular solution of partial differential equation

Score of 7
2 answers
200 views

How can we find the integral $\int_0^\infty\binom{1}{x+1/x}dx$?

Score of 1
1 answer
569 views

Are vector bundles special cases of étale bundles?

Score of 4
0 answers
47 views

Time taken to start filling the n-th row of a triangular champagne tower

Score of 2
2 answers
125 views

Prove the radii of two circles are equal

Score of 0
1 answer
41 views

Obtaining eigenvector and eigenvalue for a symmetric matrix from elliptic equations

Score of 8
8 answers
563 views

Finding the minimum value of function $\sqrt{\sqrt{x^2 + 1} + x} + \sqrt{\sqrt{x^2 + 1} -x}$

Score of 3
0 answers
632 views

Nim game real life applications

Score of 8
3 answers
2086 views

Convergence in the Box Topology.

Score of 2
1 answer
1539 views

Convergence of sequence in uniform and box topologies

Score of 1
1 answer
25 views

Existence of continuous injective group homomorphism between products of unit circle and set of all unitary matrices over complex numbers?

Score of 1
1 answer
547 views

Limiting Degrees of Freedom in 3D Point Registration

Score of 0
1 answer
52 views

Forming a quadratic equation and solving for x in the following question

Score of 5
2 answers
187 views

Category of dynamical systems

Score of 1
0 answers
53 views

How can I show RM is false with these axioms? Is Axiom 2 now acceptable?

Score of 1
2 answers
552 views

Volume calculation with change of variables

Score of 1
1 answer
329 views

Showing a sequence converges in product topology.

Score of 0
0 answers
38 views

Verifying a finite classification of a local adjacent-digit property of decimal repetends of $1/n$

Score of 0
0 answers
17 views

Clarification of a Remark in Geiges' book

Score of 1
1 answer
823 views

Understanding proof that the formal power series ring in one variable is a PID

Score of 0
1 answer
564 views

Calculate arc parameters between two given points (x,y)

Score of 2
8 answers
183 views

Evaluating $\int_0^\infty \frac{\sin^2(xu)du}{u^2}$

Score of 9
1 answer
221 views

Proving Napoleon's Theorem with classical geometry

Score of 1
2 answers
256 views

Can't understand how to show a scalar product (in tensor notation) is zero

Score of 1
1 answer
150 views

What is the substructural logic that has contraction but no weakening?

Score of 1
1 answer
552 views

Sigma algebra generated by specific functions

Score of 1
3 answers
58 views

Example 2, Sec. 29, in Munkres' TOPOLOGY, 2nd ed: Is $\mathbb{R}^\omega$ in the box topology locally compact?

Score of 13
3 answers
863 views

Intuition behind σ-algebra (not the formal definition)

Score of 2
0 answers
91 views

Streamline this ugly recurrence relation.

Score of 51
6 answers
2868 views
+100

Recursive sequence $a_{k+1} = a_k - \gcd(a_k, (n+k)^2 - 1)$ generating twin primes

Score of 3
1 answer
169 views

Concise notation for elementwise "vectorization" of matrix

Score of 0
0 answers
16 views

Reference request: Hecke operators acting as correspondences

Score of 1
0 answers
26 views

Can the Radon-Nikodym derivative be defined via prevectors?

Score of 0
1 answer
678 views

Under which conditions is the harmonic function unique that has piecewise constant values on the boundary

Score of 12
2 answers
317 views
+50

Is it true that $x_{n+1}=x_{n-1}+2\log x_n=\operatorname{li}^{-1}(n)+O(\log n)$?

Score of 10
1 answer
3342 views

What's the motivation for Runge-Kutta methods?

Score of 3
3 answers
225 views

An oddly dissatisfying derivative: $\frac{\partial^2}{\partial\alpha^2}\left(1+\alpha^{-1}\lambda\right)^{-\alpha}$

Score of 32
3 answers
6304 views

An automorphism of the field of $p$-adic numbers

Score of 0
1 answer
1131 views

How many lattice paths from (-5,-3) to (7,4) pass through neither (-1,1) nor (3,2)?

Score of 12
6 answers
14574 views

Projection of ellipsoid

Score of 2
1 answer
206 views

Witt Vector Motivation for Teichmüller representatives

Score of -3
0 answers
36 views

Is a product $\sigma$ algebra only countably generated if the involved $\sigma$-algebras are countably generated?

Score of 1
1 answer
951 views

Equivalent definitions of submodular function

Score of 2
2 answers
96 views

How can $\int_{|z|=2}\frac{z^4}{z^5-z-1}dz$ be computed?

Score of 0
0 answers
20 views

Are $X$ and $Y$ martingales given the values in the tables?

Score of 4
0 answers
172 views

Finding more solutions to seventh powers $(7,4,4)$ below a bound?

Score of 12
2 answers
1535 views

Showing that $|f(z)| \leq \prod \limits_{k=1}^n \left|\frac{z-z_k}{1-\overline{z_k}z} \right|$

Score of 2
1 answer
144 views

A simplification of an error function integral

Score of 0
1 answer
684 views

Operator decomposition in product space

Score of 3
2 answers
195 views

Geometric intuition of Integration by Parts: How to visualize non-increasing functions?

Score of 7
2 answers
576 views

Prob. 1, Sec. 29, in Munkres' TOPOLOGY, 2nd ed: The subspace $\mathbb{Q}$ of $\mathbb{R}$ is not locally compact

Score of 2
1 answer
92 views

Is the epimorphic image of a Sylow subgroup a Sylow subgroup?

Score of 2
1 answer
562 views

Orthogonal projection is independent of the basis.

Score of 9
1 answer
528 views

Concerning Ron Gordon's solution for Cleo's integral which implies the Kepler Triangle identity

Score of 1
1 answer
74 views

How to perform numerical integration+space point process

Score of 3
2 answers
605 views

Implicit total derivative of a spherical cap

Score of 11
1 answer
249 views

Near-misses to the Fermat quintic threefold $x_1^5+x_2^5+x_3^5+x_4^5+x_5^5=0$

Score of 0
1 answer
84 views

Transitive Closure as a Direct Limit/Colimit

Score of 1
1 answer
561 views

Max Expected Utility

Score of 3
2 answers
72 views

Cumulative distribution function of maximum segment of randomly divided unit interval

Score of 7
2 answers
230 views

solving $\tan^{-1}(x+1)+\tan^{-1}x+\tan^{-1}(x-1)=\tan^{-1}3$

Score of 2
1 answer
191 views

How to justify banning $A\to (B\to (A\land B))$ in relevance logic?

Score of 3
1 answer
701 views

Abelian Group In The Middle Of A Short Exact Sequence

Score of 1
0 answers
64 views

Is there a construction where the universal quantifier is more natural than the existential quantifier?

Score of 0
1 answer
577 views

Number of Permutations with given Cycle Types

Score of 0
1 answer
141 views

Set membership as a relation on a particular set

Score of 0
1 answer
132 views

Why do we use the term "continuous" to describe variables?

Browse more Questions