Davood Khajehpour

Tehran

I am interested in number theory.

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How does assuming GRH help us calculate class group?

nt.number-theory algebraic-number-theory asked Jan 23, 2021 at 15:49

mathoverflow.net

17 votes

On Siegel mass formula

nt.number-theory analytic-number-theory modular-forms automorphic-forms quadratic-forms asked Nov 14, 2017 at 14:09

mathoverflow.net

13 votes

Difference between symbols for absolute value?

symbols asked Oct 8, 2017 at 7:00

tex.stackexchange.com

9 votes

Targeted group game for 8 or 9 players

mathematical-pedagogy games asked Jun 19, 2018 at 16:43

matheducators.stackexchange.com

8 votes

Primes represented by $x^3-21xy^2+35y^3$.

number-theory prime-numbers algebraic-number-theory asked Dec 26, 2020 at 13:01

math.stackexchange.com

7 votes

How to write the music symbols in TeX?

music asked Oct 20, 2017 at 15:28

tex.stackexchange.com

7 votes

What is the intuition for $p$-adic numbers in wiki-sense?

algebraic-number-theory analytic-number-theory topological-groups p-adic-number-theory asked Jul 23, 2017 at 19:06

math.stackexchange.com

6 votes

Conditions under which an $\eta$-quotient becomes a weak modular form (reference request for theorems similar to Ligozat's theorem)

nt.number-theory reference-request analytic-number-theory algebraic-number-theory modular-forms asked Dec 3, 2021 at 19:07

mathoverflow.net

6 votes

What's the difference between the ring of Integers and the maximal order in a Number field?

abstract-algebra number-theory ring-theory algebraic-number-theory asked Jul 8, 2017 at 13:27

math.stackexchange.com

5 votes

Appealing thinking games, that are easy to make; easy to learn, and easy to play

mathematical-pedagogy games asked Jul 31, 2020 at 8:55

matheducators.stackexchange.com

Top Answers

Solving an infinite product of consecutive square roots

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Proving that $\{x\in\Bbb{R}\mid 1+x+x^2 = 0\} = \varnothing$ without the quadratic formula and without calculus

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Example of an integral domain which is not a field

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When is this integer a perfect square: $n^2 + 20n + 12$

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Finding the minimum value of $a^2+b^2+c^2$

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Can every number $n$ be written as the sum of $n$ different prime numbers?

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Sequence : $f(f(n))+f(n+1)=2n$

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Prove or disprove : If $a\equiv b$ mod $m$, when $a,b,m\in \mathbb{Z}$ , then $a^3\equiv b^3$ mod $m^2$.

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$r=\pm1$ are the only rationals with $\,r+1/r\in \Bbb Z$ (sum with its reciprocal is an integer)

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Show that for any integer $n\ge 6$, the inequality $2^n>7n$ holds.

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Finding integer solutions to $y^2=x^3-2$

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Proof that the sum of the even side and the hypotenuse of a coprime (and positive) Pythagorean triple is a square number

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Determine all pairs $(a,b)$ of positive integers such that $ab^2+b+7$ divides $a^2b+a+b$

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$x^2 + 3x + \frac{3}x + \frac{1}{x^2} = 26$ and $x$ can be written as $a + \sqrt{b}$ where $a$ and $b$ are positive integers, then find $a + b$.

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Show that $17 \mid 15! -1$

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Example of a power of 3 which is close to a power of 2 (Related to music theory and Superparticular ratios)

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How to prove that $\sum_{i=0}^n\binom{n}{i}^2 =\binom{2n}{n}$

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Prove that if $2^{m+1}+1$ divides $3^{2^m}+1$, then $2^{m+1}+1$ is a prime

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Prove that, there are infinitly many integers $n$; such that $n\mid 2^n+1$.

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If $N$ is the integer $2^43^35^27$ find the smallest positive integer $m$ such that $x^m \equiv 1 \mod N$ for all integers coprime to $N$

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Let $p$, $q$ be prime numbers such that $n^{3pq} – n$ is a multiple of $3pq$ for all positive integers $n$. Find the least possible value of $p + q$.

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When is $\alpha_1,\alpha_2,\ldots,\alpha_k$ a geometric progression?

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Find $a_n$, given $a_1=1$ and $a_{n+1} =a_n/4+3/4$

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Prove that a group $G$ is Abelian if and only if $(ab)^{-1}=a^{-1}b^{-1}$

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