User Wojowu

6 votes

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Injective choice function for "lines" in an infinite cardinal

answered May 16, 2019 at 8:10

6 votes

Cover of the positive real numbers by intervals

answered Sep 25, 2017 at 12:49

6 votes

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Function on quadratic numbers

answered Sep 8, 2016 at 9:23

6 votes

Annihilator of idempotent elements

answered Jan 14, 2020 at 12:45

6 votes

Numerical evidence that $\pi$ is not normal in base two

answered Mar 6, 2020 at 15:46

6 votes

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Non-alternating knot diagrams

answered Aug 18, 2020 at 22:15

6 votes

Does one have $2r_{0}(n)\lesssim k_{0}(n)(\log n)^{1+1/k_{0}(n)}$?

answered Nov 19, 2020 at 15:14

6 votes

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What is the differential operator $d+d^*$ called?

answered Apr 6, 2021 at 20:13

6 votes

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Fibonacci with seeds, modulo $n$

answered Apr 8, 2021 at 16:09

6 votes

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Inequalities for two functions related to the primorial function

answered Jan 6, 2023 at 11:31

6 votes

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Completion of infinite degree extension of perfectoid fields is perfectoid?

answered Jun 5, 2022 at 11:28

6 votes

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Galois invariants and tensor products

answered Feb 11, 2022 at 1:36

6 votes

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Congruence modulo 4 for a generating function leads to perfect squares?

answered Jan 19, 2022 at 18:43

6 votes

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Sunflowers in $\omega$ consisting of infinite sets

answered Jun 6, 2021 at 19:00

6 votes

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A Riemann surface is automatically paracompact

answered Sep 24, 2021 at 16:30

6 votes

When is 2 qualitatively different from 3?

answered Nov 9 at 22:18

5 votes

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Function $g:\mathbb{R}\to \mathbb{R}^n$ such that $g(\sum_{i=1}^nx_i)=(x_1,\dotsc,x_n)$ a.e

answered Oct 9 at 1:07

5 votes

Can we classify all commutative unital algebras over the reals that are closed under $\sqrt{}$?

answered Jan 27 at 23:12

5 votes

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Which extension of ZFC proves that ZFC can only prove CH satisfied by the first two sets?

answered Apr 25, 2022 at 8:20

5 votes

Is the density of integers $n$ such that the finite sequence $(\omega(n-r)\omega(n+r))_{0\leq r\leq n-1}$ is surjective positive?

answered May 31, 2022 at 19:58

5 votes

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If a function $f$ is $\varepsilon$-times Lebesgue differentiable, is $f$ continuous?

answered May 23, 2023 at 3:54

5 votes

Is every countable model of ZFC a subset of some parameter free definable pointwise-definable model of ZFC?

answered Jun 22, 2023 at 11:25

5 votes

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Can the solutions to this beautiful equation always be expressed in terms of algebraic numbers?

answered Mar 13, 2021 at 0:30

5 votes

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A typo-free detail oriented prime conjecture

answered Sep 20, 2020 at 9:31

5 votes

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Is $\mathbb{A}_k^n(k)$ dense in the Berkovich analytification of $\mathbb{A}_k^n$?

answered Sep 28, 2020 at 17:46

5 votes

Torsion in the jacobian of a super elliptic curve

answered Mar 19, 2020 at 21:31

5 votes

Largest known intervals of primes

answered Dec 10, 2019 at 16:00

5 votes

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Are all manifolds in $\mathbb R^n$ homeomorphic to a smooth manifold?

answered Aug 30, 2019 at 9:36

5 votes

Asymptotic of $\sum_{k=1}^n \operatorname{rad}(k!)$ and similar deductions

answered Sep 17, 2019 at 9:38

5 votes

Proofs of the uncountability of the reals

answered Sep 28, 2014 at 12:20

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227 Answers

Injective choice function for "lines" in an infinite cardinal

Cover of the positive real numbers by intervals

Function on quadratic numbers

Annihilator of idempotent elements

Numerical evidence that $\pi$ is not normal in base two

Non-alternating knot diagrams

Does one have $2r_{0}(n)\lesssim k_{0}(n)(\log n)^{1+1/k_{0}(n)}$?

What is the differential operator $d+d^*$ called?

Fibonacci with seeds, modulo $n$

Inequalities for two functions related to the primorial function

Completion of infinite degree extension of perfectoid fields is perfectoid?

Galois invariants and tensor products

Congruence modulo 4 for a generating function leads to perfect squares?

Sunflowers in $\omega$ consisting of infinite sets

A Riemann surface is automatically paracompact

When is 2 qualitatively different from 3?

Function $g:\mathbb{R}\to \mathbb{R}^n$ such that $g(\sum_{i=1}^nx_i)=(x_1,\dotsc,x_n)$ a.e

Can we classify all commutative unital algebras over the reals that are closed under $\sqrt{}$?

Which extension of ZFC proves that ZFC can only prove CH satisfied by the first two sets?

Is the density of integers $n$ such that the finite sequence $(\omega(n-r)\omega(n+r))_{0\leq r\leq n-1}$ is surjective positive?

If a function $f$ is $\varepsilon$-times Lebesgue differentiable, is $f$ continuous?

Is every countable model of ZFC a subset of some parameter free definable pointwise-definable model of ZFC?

Can the solutions to this beautiful equation always be expressed in terms of algebraic numbers?

A typo-free detail oriented prime conjecture

Is $\mathbb{A}_k^n(k)$ dense in the Berkovich analytification of $\mathbb{A}_k^n$?

Torsion in the jacobian of a super elliptic curve

Largest known intervals of primes

Are all manifolds in $\mathbb R^n$ homeomorphic to a smooth manifold?

Asymptotic of $\sum_{k=1}^n \operatorname{rad}(k!)$ and similar deductions

Proofs of the uncountability of the reals