User GH from MO

27 votes

Accepted

Tight prime bounds

answered Jul 23, 2014 at 12:41

27 votes

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p^2 dividing n^8-n^4+1

answered Dec 26, 2011 at 10:31

27 votes

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Minimum number of $|\cdot|$ operations necessary to express $\max$

answered Jun 14, 2023 at 22:18

27 votes

Correlation of the Möbius function

answered Mar 4, 2018 at 17:55

27 votes

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An infinite series that converges to $\frac{\sqrt{3}\pi}{24}$

answered Aug 2, 2021 at 4:49

26 votes

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When does $axy+byz+czx$ represent all integers?

answered Sep 17, 2019 at 18:52

26 votes

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$\lfloor \frac{3^n}{2^n} \rfloor = \lfloor \frac{3^n-1}{2^n-1} \rfloor$ for $n\geq2$

answered Nov 9, 2019 at 21:15

26 votes

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Roots of $x^n-x^{n-1}-\cdots-x-1$

answered May 24, 2019 at 19:42

26 votes

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Upper bounds for the sum of primes up to $n$

answered Apr 29, 2011 at 15:20

25 votes

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Is this Riemann zeta function product equal to the Fourier transform of the von Mangoldt function?

answered Apr 2, 2014 at 14:00

25 votes

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Does $2^x-3p^y=5$ (with $p$ an odd prime) have only finitely many positive integer solutions?

answered Sep 2, 2018 at 1:57

24 votes

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Putnam 2020 inequality for complex numbers in the unit circle

answered Sep 8, 2021 at 21:34

24 votes

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How many square roots can a non-identity element in a group have?

answered Dec 15, 2021 at 6:51

24 votes

Is $ \sum\limits_{n=0}^\infty x^n / \sqrt{n!} $ positive?

answered Jan 6, 2012 at 5:56

24 votes

What is prime power of this equation of p?

answered May 18, 2015 at 23:44

23 votes

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Evaluating an infinite sum related to $\sinh$

answered Feb 27, 2016 at 15:17

23 votes

Contest problems with connections to deeper mathematics

answered Jul 7, 2011 at 19:50

23 votes

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The Riemann Hypothesis and the Langlands program

answered Jan 19, 2013 at 17:53

23 votes

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Is irreducibility of polynomials $\in \mathbb{Z} [X]$ over $\mathbb{Q}$ an undecidable problem?

answered Feb 22, 2022 at 15:37

23 votes

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Value of an integral

answered Sep 8, 2020 at 6:18

23 votes

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Floor of Riemann zeta function

answered May 2, 2019 at 20:54

22 votes

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A curious prime counting approximation or just data overfitting?

answered Jun 4, 2019 at 19:33

22 votes

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Order of magnitude of $\sum \frac{1}{\log{p}}$

answered Nov 15, 2013 at 20:39

22 votes

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Modular forms of fractional weight

answered Jan 23, 2011 at 23:01

22 votes

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Elementary congruences and L-functions

answered Feb 13, 2016 at 3:25

22 votes

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Conjecture: The number of points modulo $p$ of certain elliptic curve is $p$ or $p+2$ for $p$ of form $p=27a^2+27a+7$

answered Oct 18, 2017 at 17:46

22 votes

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Squarefree numbers $n$ such that $432n+1$ is also squarefree

answered Aug 5, 2014 at 18:16

21 votes

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Sequence $(x_n)$ whose first $p$ terms is a complete residue system: value of $\lim\limits_{n\to\infty}\frac{x_n}{n}$?

answered Nov 20, 2017 at 16:18

21 votes

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A natural residue formula

answered Feb 5, 2018 at 12:49

21 votes

Accepted

How can one understand the Eisenstein series E2 in terms of automorphic representation?

answered Apr 20, 2017 at 20:47

Stack Exchange Network

1,015 Answers

Tight prime bounds

p^2 dividing n^8-n^4+1

Minimum number of $|\cdot|$ operations necessary to express $\max$

Correlation of the Möbius function

An infinite series that converges to $\frac{\sqrt{3}\pi}{24}$

When does $axy+byz+czx$ represent all integers?

$\lfloor \frac{3^n}{2^n} \rfloor = \lfloor \frac{3^n-1}{2^n-1} \rfloor$ for $n\geq2$

Roots of $x^n-x^{n-1}-\cdots-x-1$

Upper bounds for the sum of primes up to $n$

Is this Riemann zeta function product equal to the Fourier transform of the von Mangoldt function?

Does $2^x-3p^y=5$ (with $p$ an odd prime) have only finitely many positive integer solutions?

Putnam 2020 inequality for complex numbers in the unit circle

How many square roots can a non-identity element in a group have?

Is $ \sum\limits_{n=0}^\infty x^n / \sqrt{n!} $ positive?

What is prime power of this equation of p?

Evaluating an infinite sum related to $\sinh$

Contest problems with connections to deeper mathematics

The Riemann Hypothesis and the Langlands program

Is irreducibility of polynomials $\in \mathbb{Z} [X]$ over $\mathbb{Q}$ an undecidable problem?

Value of an integral

Floor of Riemann zeta function

A curious prime counting approximation or just data overfitting?

Order of magnitude of $\sum \frac{1}{\log{p}}$

Modular forms of fractional weight

Elementary congruences and L-functions

Conjecture: The number of points modulo $p$ of certain elliptic curve is $p$ or $p+2$ for $p$ of form $p=27a^2+27a+7$

Squarefree numbers $n$ such that $432n+1$ is also squarefree

Sequence $(x_n)$ whose first $p$ terms is a complete residue system: value of $\lim\limits_{n\to\infty}\frac{x_n}{n}$?

A natural residue formula

How can one understand the Eisenstein series E2 in terms of automorphic representation?