Intrinsic approach to Galois theory of q-difference equations
Résumé
The Galois theory of difference equations has witnessed a major evolution in the last two decades. In the particular case of -difference equations, authors have introduced several different Galois theories. In this memoir we consider an arithmetic approach to the Galois theory of -difference equations and we use it to establish an arithmetical description of some of the Galois groups attached to -difference systems.
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