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Differential Galois theory

open access: yes, 2020
Galois Theory is a powerful tool to study the roots of polynomials. In this sense, the differential Galois theory is the analogue of Galois theory for linear differential equations. In this thesis, we will construct the notion of a differential field and Picard-Vessiot extension of a linear differential equation as the analogue of a field and the ...
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Differential Galois theory of infinite dimension [PDF]

open access: yesNagoya Mathematical Journal, 1996
This paper is the second part of our work on differential Galois theory as we promised in [U3]. Differential Galois theory has a long history since Lie tried to apply the idea of Abel and Galois to differential equations in the 19th century (cf. [U3], Introduction). When we consider Galois theory of differential equation, we have to separate the finite
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Parameterized generic Galois groups for q-difference equations, followed by the appendix "The Galois D-groupoid of a q-difference system" by Anne Granier

open access: yes, 2012
We introduce the parameterized generic Galois group of a q-difference module, that is a differential group in the sense of Kolchin. It is associated to the smallest differential tannakian category generated by the q-difference module, equipped with the ...
Di Vizio, Lucia, Hardouin, Charlotte
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Galois theory of differential schemes

open access: yes
Added the theory of geometric quotients and several applications and ...
Tomašić, Ivan, Noohi, Behrang
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Galois theory of differential fields of positive characteristic [PDF]

open access: yesPacific Journal of Mathematics, 1989
Strongly normal extensions of a differential field \(K\) of positive characteristic are defined. On the set \(G\) of all differential isomorphisms of a strongly normal extension \(N\) of \(K\), a structure of an algebraic group is induced. Correspondences between subgroups of \(G\) and intermediate differential fields of \(N\) and \(K\) are studied ...
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