Results 11 to 20 of about 23,993 (138)

First-order theory of a field and its Inverse Galois Problem [PDF]

open access: green, 2020
Let $G$ be a finite group. Then there exists a first-order statement $S(G)$ in the language of rings without parameters and depending only on $G$ such that, for any field $K$, we have that $K\models S(G)$ if and only if $K$ has a Galois extension with the Galois group isomorphic to $G$.
Francesca Balestrieri   +2 more
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Abelian constraints in inverse Galois theory [PDF]

open access: closedmanuscripta mathematica, 2008
Let \(k\) be a field, \(B\) a \(k\)-curve (i.e. a smooth projective and geometrically connected \(k\)-scheme of dimension 1), \(G\) a finite group, \(f:Y\to B\) a \(k\)-\(G\)-cover of curves with group \(G\) and ramification indices \(e_1,\dots,e_r\) and let \(P\) be ant subgroup of \(G\) of index \(m.\) Assume that the branch divisor of \(f:Y\to B ...
Anna Cadoret, Pierre Dèbes
openalex   +3 more sources

On the Constructive Inverse Problem in Differential Galois Theory# [PDF]

open access: closedCommunications in Algebra, 2005
Several misprints have been corrected and the statement of Propositions 3.2 and 3.4 have been made more precise and their proofs ...
William J. Cook   +2 more
openalex   +4 more sources

Galois Theory under inverse semigroup actions [PDF]

open access: green
30 ...
Wesley G. Lautenschlaeger   +1 more
openalex   +3 more sources

Commutative and noncommutative aspects of inverse Galois theory

open access: green, 2021
In this thesis, we are dealing with both commutative and noncommutative aspects of inverse Galois theory. In the commutative setting, we produce explicit Galois realizations of some infinite families of 2-groups. In the non-commutative setting, we study the inverse Galois problem and finite embedding problems over some twisted skew fields of fractions.
Angelot Behajaina
openalex   +3 more sources

Book Review: Inverse Galois theory [PDF]

open access: diamondBulletin of the American Mathematical Society, 2000
Helmut Völklein
openalex   +3 more sources

On Ramis's solution of the local inverse problem of differential Galois theory

open access: closedJournal of Pure and Applied Algebra, 1996
\textit{J. P. Ramis} [About the inverse problem in differential Galois theory: The differential Abhyankar conjecture. In: Braaksma, B. L. J. (ed.) et al., The Stokes phenomenon and Hilbert's 16th problem. Proceedings of the workshop, Groningen, 261-278 (1996; Zbl 0860.12003)] gave necessary and sufficient conditions for a linear algebraic group to be ...
Claude Mitschi, Michael F. Singer
openalex   +3 more sources

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