TransWikia.com
  1. All Categories
  2. MathOverflow

MathOverflow : Recent Questions and Answers (Page 17)

Find answers to your questions about MathOverflow or help others by answering their MathOverflow questions.

The action of a subgroup of the torsion group of elliptic curves on integral points?

Let $E$ be an elliptic curve given in long Weierstraß form with all coefficients $a_1,a_2,a_3,a_4,a_6 in mathbb{Z}$. It is known that the rational points $E(mathbb{Q})$ form a...

Asked on 11/12/2021 by user6671

1 answer

Data abstraction in set theory via Urelements

I am working in a setting of set theory where set theory is embedded in simply-typed higher-order logic, basically as described for example inChad E. Brown and Cezary Kaliszyk and...

Asked on 11/12/2021 by Steven Obua

1 answer

Closed form for the integral of a squared Legendre function

Is there a closed form for the integral $$int_0^{pi/2}(P_nu^mu(costheta))^2,mathrm dtheta,quadmu>nugt-frac12$$ where $P_nu^mu(x)$ is the associated Legendre function of the first kind?I encountered this integral while...

Asked on 11/12/2021 by 西島晃彦 a.k.a. Teru-san

1 answer

Sufficient conditions for $mathrm{Der}_k(A)$ to be f.g. projective

Let $k$ be a field and $A$ a commutative $k$-algebra. What are sufficient conditions for the module of derivations $mathrm{Der}_k(A)$ to be finitely generated projective? I'm...

Asked on 11/12/2021 by Tobias Fritz

1 answer

Curvature collineation and the Killing identity

The Lie derivative of a general covariant $4$-tensor is given by$$mathcal{L}_{K}R_{abcd} = X^{e}nabla_{e}R_{abcd} + R_{ebcd}nabla_{a}X^{e} + R_{aecd}nabla_{b}X^{e} + R_{abed}nabla_{c}X^{e} + R_{abce}nabla_{d}X^{e},$$ where $X^{a}$ is a...

Asked on 11/12/2021 by Spoilt Milk

1 answer

Random walk in a switching scenery

For each $x in mathbf{Z}$ let $(eta_t(x))_{tgeq0}$ denote independent copies of a process $(eta_t(0))_{tgeq0}$ defined as follows. The process $eta_t(0)$ takes values in ${-1,1}$, where...

Asked on 11/12/2021

0 answer

Modern example of a reciprocity law and intuition behind it

I'm very new to the Langlands program and I was going through the Gauss reciprocity law, Hilbert's 9th problem, Artin's reciprocity law which allowed him to identify the Artin's L-functions...

Asked on 11/12/2021

0 answer

Hodge numbers rule out good reduction

A theorem of Fontaine says that if a geometrically connected smooth proper variety $X$ over $mathbb{Q}$ has good reduction everywhere then $h^{i, j}(X)=0$ for $ineq j$,...

Asked on 11/12/2021

1 answer

Positivity of $ int_{-infty}^{infty} left{{2^{1/beta-1/2} over v}right}^{it} { Gamma{(it+1)/beta}over Gamma{(it+1)/2} }dt$

I have the following function $$int_{-infty}^{infty} left{{2^{1/beta-1/2} over v}right}^{it}{ Gamma{(it+1)/beta}over Gamma{(it+1)/2} }dt$$ where $1<beta<2$, $v>0$. Need to show it is positive. The inverse Mellin...

Asked on 11/09/2021 by Vova

1 answer

Solving system of bilinear equations

Consider a collection of $m$ matrices $A_i$ of size $ntimes n$, and a vector $b$ of size $m$. I want to solve the bilinear system...

Asked on 11/09/2021 by grok

1 answer

Ask a Question

Get help from others!

© 2024 TransWikia.com. All rights reserved. Sites we Love: PCI Database, UKBizDB, Menu Kuliner, Sharing RPP