User Wojowu

12 votes

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Graphs with exactly $n$ perfect matchings

answered Sep 23, 2018 at 12:33

12 votes

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$g(a)$ divides monic $f(a)$ many times, is this possible?

answered Oct 28, 2017 at 14:13

12 votes

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When is $2\varphi(n) > n$ – and how to prove it?

answered Jan 9, 2019 at 10:32

12 votes

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Does perfect fraction field imply perfect residue field?

answered May 14, 2021 at 20:42

12 votes

Are radicals dense in the real closure of an ordered field?

answered Jul 29, 2019 at 18:11

12 votes

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Rationality of field embeddings

answered May 5, 2022 at 22:01

12 votes

Continuous linear functionals and the Axiom of Choice

answered Oct 14, 2021 at 21:23

12 votes

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Examples of locally compact groups that do not admit enough finite dimensional representations

answered Dec 7, 2021 at 9:37

11 votes

Is the function $F(x) = \exp(x) + \exp(\exp(x))x$ a hypertranscendental function?

answered Jan 4, 2022 at 19:29

11 votes

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Tiling the plane with finitely many congruent pieces

answered Oct 23, 2021 at 18:20

11 votes

A conjecture about 433

answered Sep 30, 2021 at 15:15

11 votes

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Is the ideal product presheaf a sheaf? Do we have any reasons to believe it will be / it won't?

answered May 16, 2022 at 15:29

11 votes

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On actions of finite groups on adic spaces

answered Nov 4, 2022 at 11:48

11 votes

Size of a generator of the unit group in a cyclic cubic field

answered Jul 9, 2022 at 14:12

11 votes

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What is the elementary proof of Weil's polynomial theorem of decomposition?

answered Nov 30, 2019 at 17:38

11 votes

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On the convergence of $\sum_{n=1}^{\infty} \frac{\lambda(n)}{n}$ and the Prime Number Theorem

answered Feb 9, 2019 at 22:53

11 votes

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Examples of transfinite towers

answered Mar 16, 2019 at 21:47

10 votes

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What is the asymptotic growth of $\sum_{k=1}^n 2^{\omega_k}$?

answered Sep 28, 2018 at 14:01

10 votes

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Homogeneous van der Waerden

answered Dec 24, 2018 at 9:58

10 votes

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Bounding and dominating numbers ${\frak b}, {\frak d}$ via ultrafilters

answered Feb 12, 2016 at 8:46

10 votes

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Why is this not a perfect square?

answered Sep 18, 2016 at 13:22

10 votes

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Is every path connected $F_\sigma$ subset of a plane an image of $[0,1)$?

answered Jun 15, 2021 at 10:27

10 votes

Do we need full choice to "efficiently" use (sub)bases?

answered Jan 18, 2021 at 10:08

10 votes

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Algebraic and rational parts of a real number

answered Feb 4, 2021 at 20:53

10 votes

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Density of prime ideals of a given degree

answered Jul 23, 2023 at 19:22

10 votes

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Why finitely presentable objects in Top need to be discrete?

answered Jul 6, 2022 at 12:47

9 votes

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On the behaviour for the quotient involving Fermat numbers of $\frac{\psi(F_m)}{F_m}$ where $\psi(x)$ denotes the Dedekind psi function

answered Jun 17, 2022 at 19:13

9 votes

A ring map from algebraic integers to algebraic closure of $\mathbb F_p$

answered May 7, 2023 at 3:32

9 votes

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What is the Galois group of one ultrapower over another ultrapower?

answered Jan 24, 2021 at 22:59

9 votes

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Countable choice for countable subfamily

answered Jun 8, 2021 at 22:44

Stack Exchange Network

227 Answers

Graphs with exactly $n$ perfect matchings

$g(a)$ divides monic $f(a)$ many times, is this possible?

When is $2\varphi(n) > n$ – and how to prove it?

Does perfect fraction field imply perfect residue field?

Are radicals dense in the real closure of an ordered field?

Rationality of field embeddings

Continuous linear functionals and the Axiom of Choice

Examples of locally compact groups that do not admit enough finite dimensional representations

Is the function $F(x) = \exp(x) + \exp(\exp(x))x$ a hypertranscendental function?

Tiling the plane with finitely many congruent pieces

A conjecture about 433

Is the ideal product presheaf a sheaf? Do we have any reasons to believe it will be / it won't?

On actions of finite groups on adic spaces

Size of a generator of the unit group in a cyclic cubic field

What is the elementary proof of Weil's polynomial theorem of decomposition?

On the convergence of $\sum_{n=1}^{\infty} \frac{\lambda(n)}{n}$ and the Prime Number Theorem

Examples of transfinite towers

What is the asymptotic growth of $\sum_{k=1}^n 2^{\omega_k}$?

Homogeneous van der Waerden

Bounding and dominating numbers ${\frak b}, {\frak d}$ via ultrafilters

Why is this not a perfect square?

Is every path connected $F_\sigma$ subset of a plane an image of $[0,1)$?

Do we need full choice to "efficiently" use (sub)bases?

Algebraic and rational parts of a real number

Density of prime ideals of a given degree

Why finitely presentable objects in Top need to be discrete?

On the behaviour for the quotient involving Fermat numbers of $\frac{\psi(F_m)}{F_m}$ where $\psi(x)$ denotes the Dedekind psi function

A ring map from algebraic integers to algebraic closure of $\mathbb F_p$

What is the Galois group of one ultrapower over another ultrapower?

Countable choice for countable subfamily