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We present an algorithm that determines the Galois group of linear difference equations with rational function coefficients.

Symbolic Computation · Computer Science 2015-03-10 Ruyong Feng

This article computes the Galois groups of congruence covers arising in the context of certain hyperbolic triangle groups. As a consequence of this computation, the genera of the respective curves are deduced.

Number Theory · Mathematics 2015-03-03 Luiz Kazuo Takei

In the first part of this paper we try to explain to a general mathematical audience some of the remarkable web of conjectures linking representations of Galois groups with algebraic geometry, complex analysis and discrete subgroups of Lie…

Number Theory · Mathematics 2007-05-23 Richard Taylor

We extend Kovacic's algorithm to compute the differential Galois group of some second order parameterized linear differential equation. In the case where no Liouvillian solutions could be found, we give a necessary and sufficient condition…

Classical Analysis and ODEs · Mathematics 2019-02-22 Thomas Dreyfus

We present a detailed and simplified version of Hrushovski's algorithm that determines the Galois group of a linear differential equation. There are three major ingredients in this algorithm. The first is to look for a degree bound for…

Symbolic Computation · Computer Science 2015-03-10 Ruyong Feng

This paper describes the classification of analytic $q$-difference equations. The difference Galois groups are computed. A tentative description of the universal difference Galois group is given.

Commutative Algebra · Mathematics 2007-05-23 Marius van der Put

We present a family of algorithms for computing the Galois group of a polynomial defined over a $p$-adic field. Apart from the "naive" algorithm, these are the first general algorithms for this task. As an application, we compute the Galois…

Number Theory · Mathematics 2020-03-13 Christopher Doris

The aim of this paper is to give a new result of the differential Galois theory of linear ordinary differential equations. In particular, we compute differential Galois group for special type non-resonant Fuchsian system.

Group Theory · Mathematics 2013-12-09 Ala Avoyan

Motivated by developing algorithms that decide hypertranscendence of solutions of extensions of the Bessel differential equation, algorithms computing the unipotent radical of a parameterized differential Galois group have been recently…

Representation Theory · Mathematics 2020-11-17 Andrei Minchenko , Alexey Ovchinnikov

We apply the differential Galois theory for difference equations developed by Hardouin and Singer to compute the differential Galois group for a second-order linear $q$-difference equation with rational function coefficients. This Galois…

Number Theory · Mathematics 2025-03-21 Carlos E. Arreche , Yi Zhang

In this article we compute Galois groupoid of discret Painlev{\'e} equations. Our main tool is a semi-continuity theorem for the Galois groupoid in a confluence situation of a diffrence equation to a differential equation.

Algebraic Geometry · Mathematics 2020-06-05 Guy Casale , Damien Davy

We develope basic geometric quantities and properties of hypersurfaces in Carnot groups.

Differential Geometry · Mathematics 2007-05-23 D. Danielli , N. Garofalo , D. M. Nhieu

For every graph that is mimimally rigid in the plane, its Galois group is defined as the Galois group generated by the coordinates of its planar realizations, assuming that the edge lengths are transcendental and algebraically independent.…

Combinatorics · Mathematics 2024-01-17 Mehdi Makhul , Josef Schicho , Audie Warren

We present a Galois theory of parameterized linear differential equations where the Galois groups are linear differential algebraic groups, that is, groups of matrices whose entries are functions of the parameters and satisfy a set of…

Classical Analysis and ODEs · Mathematics 2007-05-23 Phyllis J. Cassidy , Michael F. Singer

We develop algorithms to compute the differential Galois group corresponding to a one-parameter family of second order homogeneous ordinary linear differential equations with rational function coefficients. More precisely, we consider…

Commutative Algebra · Mathematics 2012-08-13 Carlos E. Arreche

We construct plane models of the modular curve $X_H(\ell)$, and use their explicit equations to compute Galois representations associated to modular forms for values of $\ell$ that are significantly higher than in prior works.

Number Theory · Mathematics 2014-03-19 Maarten Derickx , Mark van Hoeij , Jinxiang Zeng

In this paper we compute the difference Galois groups of the Lie-irreducible regular singular generalized q-hypergeometric equations of order 3 with q-real parameters by using a density theorem due to Sauloy. In contrast with the…

Classical Analysis and ODEs · Mathematics 2007-11-26 Julien Roques

We compute the Galois groups for a certain class of polynomials over the the field of rational numbers that was introduced by S. Mori and study the monodromy of corresponding hyperelliptic jacobians.

Algebraic Geometry · Mathematics 2015-04-16 Yuri G. Zarhin

For any finite group G and integer i, let $\mathcal{H}^i(G)$ be the set of all the isomorphism classes of the Galois cohomology groups $\hat{H}^i(K/k,E_K)$, where K/k runs over all the unramified G-extension of number fields and E_K denotes…

Number Theory · Mathematics 2013-02-07 Manabu Ozaki

We develop a computational framework for the statistical characterization of Galois characters with finite image, with application to characterizing Galois groups and establishing equivalence of characters of finite images of…

Number Theory · Mathematics 2020-12-22 David Kohel
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