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We give archimedean and non-archimedean constructions of Darmon points on modular abelian varieties attached to automorphic forms over arbitrary number fields and possibly non-trivial central character. An effort is made to present a…

Number Theory · Mathematics 2019-07-05 Xavier Guitart , Marc Masdeu , Santiago Molina

Polar varieties have in recent years been used by Bank, Giusti, Heintz, Mbakop, and Pardo, and by Safey El Din and Schost, to find efficient procedures for determining points on all real components of a given non-singular algebraic variety.…

Algebraic Geometry · Mathematics 2008-12-23 Heidi Camilla Mork , Ragni Piene

This article studies an extended Nori and local fundamental group schemes of Abelian varieties. We also discuss the birational invariance of these group schemes and study their behaviour under the Albanese and \'{e}tale morphisms.

Algebraic Geometry · Mathematics 2026-02-24 Pavan Adroja , Sanjay Amrutiya

In this paper we discuss multiplicative relations between eigenvalues of Frobenius endomorphism of abelian varieties of small dimension over finite fields.

Number Theory · Mathematics 2014-06-30 Yuri G. Zarhin

We study a generalization of the classical correspondence between homogeneous quadratic polynomials, quadratic forms, and symmetric/alternating bilinear forms to forms in $n$ variables. The main tool is combinatorial polarization, and the…

Number Theory · Mathematics 2015-09-21 Aleš Drápal , Petr Vojtěchovský

We give some easy necessary and sufficient criteria for twists of abelian varieties by Artin representations to be simple.

Number Theory · Mathematics 2016-07-21 Alex Bartel

We give optimal estimates on the variation of the differential and modular heights within an isogeny class of abelian varieties defined over the function field of a curve (in any characteristic). We also prove a parallelogram inequality for…

Number Theory · Mathematics 2025-03-19 Richard Griffon , Samuel Le Fourn , Fabien Pazuki

We consider an ultra-small system of polarized bosons on an optical lattice with a ring topology interacting via long range dipole-dipole interactions. Dipoles polarized perpendicular to the plane of the ring reveal sharp transitions…

Quantum Gases · Physics 2013-05-29 Michal Maik , Pierfrancesco Buonsante , Alessandro Vezzani , Jakub Zakrzewski

We reduce the problem of the projective normality of polarized abelian varieties to check the rank of very explicit matrices. This allow us to prove some results on normal generation of primitive line bundles on abelian threefolds and…

Algebraic Geometry · Mathematics 2007-05-23 Luis Fuentes Garcia

We provide some conditions for the image of a morphism of abelian schemes to again be an abelian scheme. For context, in characteristic 0, the image is always an abelian scheme; in mixed and positive characteristic the image can fail to be…

Algebraic Geometry · Mathematics 2024-12-20 Jeff Achter , Sebastian Casalaina-Martin , Jonathan Wise

We introduce and study a new way to catagorize supersingular abelian varieties defined over a finite field by classifying them as fully maximal, mixed, or fully minimal. The type of $A$ depends on the normalized Weil numbers of $A$ and its…

Number Theory · Mathematics 2017-11-06 Valentijn Karemaker , Rachel Pries

We obtain necessary and sufficient conditions for abelian varieties to acquire semistable reduction over fields of low degree. Our criteria are expressed in terms of torsion points of small order defined over unramified extensions.

alg-geom · Mathematics 2016-08-30 A. Silverberg , Yu. G. Zarhin

In this paper, a review on dielectric mixtures and the importance of the numerical simulations of dielectric mixtures are presented. It stresses on the interfacial polarization observed in mixtures. It is shown that this polarization can…

Materials Science · Physics 2016-11-18 Enis Tuncer , Yuriy V. Serdyuk , Stanislaw M. Gubanski

We introduce the notion of tropical curves of hyperelliptic type. These are tropical curves whose Jacobian is isomorphic to that of a hyperelliptic tropical curve, as polarized tropical abelian varieties. We show that this property depends…

Combinatorics · Mathematics 2019-10-24 Daniel Corey

Let $X$ be a polarized abelian variety over a field $K$. Let $O$ be a ring with an involution that acts on $X$ and this action is compatible with the polarization. We prove that the natural action of $O$ on $(X \times X^t)^4$ is compatible…

Algebraic Geometry · Mathematics 2022-02-01 Yuri G. Zarhin

Inspired by a theorem of Gruson-Lazarsfeld-Peskine bounding the Castelnuovo-Mumford regularity of curves in projective spaces, we bound the Theta-regularity of curves in polarized abelian varieties.

Algebraic Geometry · Mathematics 2012-09-21 Luigi Lombardi , Wenbo Niu

For any given Salem number, we construct an automorphism on a simple abelian variety whose first dynamical degree is the square of the Salem number. Our construction works for both simple abelian varieties with totally indefinite quaternion…

Algebraic Geometry · Mathematics 2020-07-07 Nguyen-Bac Dang , Thorsten Herrig

We introduce an invariant of varieties in positive characteristic which generalizes the a-number of an abelian variety. We calculate it in some examples and discuss its meaning for moduli.

Algebraic Geometry · Mathematics 2007-05-23 G. van der Geer , T. Katsura

In this article, we give a complete description of the characteristic polynomials of supersingular abelian varieties over finite fields. We list them for the dimensions upto 7.

Algebraic Geometry · Mathematics 2011-10-07 Vijaykumar Singh , Gary McGuire , Alexey Zaytsev

Let X be a flexible variety of F be an isomorphism of closed one-dimensional subschemes of $X$. We develop criteria which guarantee that F extends to au automorphism of X.

Algebraic Geometry · Mathematics 2021-04-05 Shulim Kaliman , David Udumyan
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