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12 votes
6 answers
1k views

Sum and sum of cubes are both perfect cubes

18 votes
2 answers
1k views

What is this modified arithmetico-geometric mean function?

15 votes
3 answers
2k views

Where did this Pólya's theorem appear?

5 votes
3 answers
617 views

Why isn’t the weak-* topology normed?

14 votes
1 answer
688 views

An identity involving binomial coefficients

13 votes
1 answer
601 views

Where can I find a reference table for ordinal arithmetic?

6 votes
2 answers
352 views

Does the converse of Schur's lemma hold for smooth representations of finite length of p-adic group?

1 vote
2 answers
284 views

The strong Mersenne conjecture

6 votes
1 answer
473 views

Construction of algebra objects

4 votes
2 answers
357 views

Finite pushforward of symmetric differentials

5 votes
1 answer
486 views

Closed form for A131823

4 votes
2 answers
312 views

On the connection between chaos and ergodicity

7 votes
1 answer
283 views

The second Brauer-Thrall conjecture for finitely generated algebras

2 votes
1 answer
383 views

Power series with integer coefficients: surprising facts, and one question

6 votes
2 answers
267 views

Existence of collision-free assignment of points

7 votes
1 answer
161 views

Circle action on free loop space of a classifying space

4 votes
1 answer
269 views

Expected distance between order statistics from independent uniform samples

3 votes
2 answers
124 views

Representing elements of Tate-Shafarevich group of $E$ as translates of $E$ in abelian variety

4 votes
1 answer
333 views

An elementary problem on univariate polynomials

2 votes
1 answer
258 views

Explicit formulas of cardinal on an elliptic curve

3 votes
1 answer
245 views

Upper bound on the number of vertices

2 votes
1 answer
315 views

Identity for A000123

5 votes
1 answer
136 views

Categorical structure guaranteed to exist, but not necessarily preserved

2 votes
1 answer
160 views

Roots of unity under homomorphisms of $S^1$ to itself

2 votes
1 answer
202 views

Endomorphisms of groups schemes involving $\mathbb{G}_a$ and flat base change

-1 votes
1 answer
129 views

Heuristic conjecture: Weighted Langrange-Goldbach asymmetry

3 votes
1 answer
163 views

Kinematic vector fields with a flow

1 vote
3 answers
157 views

Looking for constructive example of two complementary, dense sets, both with non-zero Lebesgue measure that add to the unit interval [closed]

2 votes
2 answers
176 views

A distribution on $\mathbb R^n$ whose derivative is a Radon measure is locally $L^{\frac{n}{n-1}}$

2 votes
1 answer
166 views

An equality for the arithmetic genus of a divisor on a smooth surface

2 votes
1 answer
129 views

If we work in first-order intuitionistic logic, does the Well-ordering Principle schema imply the induction schema over $PA^-$?

-1 votes
1 answer
273 views
+50

In search for certain simple $C^*$ algebra by motivations from "Space Filling Curve"

2 votes
1 answer
205 views

Large sieve inequality with double sum

5 votes
1 answer
139 views

References for finite sums $\sum_{k=1}^n \binom{k}{p} q^k$

1 vote
2 answers
178 views

Real analytic factorization: does an ellipsoidal zero set force $f = g \cdot h $ with $h$ non-vanishing?

3 votes
1 answer
107 views

Locally compact topology on subsets of Cantor set

11 votes
0 answers
223 views

Can a Cohen real add a Kurepa tree?

3 votes
1 answer
131 views

A structured recursive formula for the complete homogeneous symmetric polynomial

0 votes
1 answer
129 views

How can I prove following equation (containing a sum of binomial coefficients)?

1 vote
1 answer
195 views

Prime products and powers

2 votes
0 answers
303 views

Derived linear dual of Banach space(Frechet space) in condensed $\mathbb{R}$ vector space

3 votes
1 answer
110 views

Strict transformation preserving nonsingularity

-1 votes
1 answer
137 views

Can we have a downshifting elementary embedding in stratified ZF?

8 votes
0 answers
224 views

Ind extension of Stone duality is fully faithful

2 votes
1 answer
132 views

Difference sets, skew-Hadamard matrices and elements in group rings

2 votes
2 answers
126 views

An example for an unbounded function which gives a Carleson measure for the Dirichlet space

3 votes
1 answer
87 views

Hermite-type convex interpolation

4 votes
1 answer
142 views

Infinite sum over pairs of Legendre polynomials


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