Joel Cohen

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3,669 reputation
1121
bio website math.univ-bpclermont.fr/…
location Clermont-Ferrand, France
age 28
visits member for 2 years
seen 14 hours ago
stats profile views 609

I don't really smoke pipe, this is just for style.

Also I'm a Phd student in Number Theory. My current research revolves around Harmonic Analysis on p-adic groups, Automorphic Forms and Langlands Program.


77 Answers

newest activity votes
16
Is there an equation to describe regular polygons?
15
Does $f(z+2\pi)=f(z)$ for all $z\in \mathbb{C}$?
14
Determine the number of functions $f: \mathbb{Z}_{p^n} \to \mathbb{Z}_{p^n}$
11
How to prove those “curious identities”?
11
Continuity of the roots of a polynomial in terms of its coefficients
11
Summation of complex numbers
10
What is a Number Theorist
10
A “naive” proof approach for the convergence of $(n!)^2/(2n)!$
10
Factorial division using Pascal's triangle.
9
Putnam problem of the day, roots of a polynomial
9
Is the reciprocal of an analytic function analytic?
8
orthonormal polynomials
7
$i^2$ why is it $-1$ when you can show it is $1$?
7
Why is it that Complex Numbers are algebraically closed?
7
Motivation for triangle inequality
6
Is $\mathbb{R}$ equipotent to $\mathbb{R}^2$?
5
Puzzle: Dropping balls along the way
5
Describe the locus of points of this fraction
5
Write down a $\mathbb Q$-Basis for $\mathbb Q(\alpha, i)$ and show that $\mathbb Q(\alpha, i) = \mathbb Q(\alpha + i)$.
4
Faithful representation implies group is cyclic
4
Germs of continuous functions
4
Prove $\sum a_n^2$ converges.
4
Show either $f$ is constant or $g(z)=0$ for all $z$ in the region
4
Why is the group of rational numbers with odd denominators residually finite?
4
Counterexample to Jensen's inequality
4
Is there a use for this binary operation?
4
How to think about multiplication with a number $0 <x < 1$?
4
A specific type of orthogonal bases
4
Detecting a negative coefficient in a power series
4
Showing a quotient group $G/\langle x_0\rangle$ to be a direct sum of cyclic groups
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