Difference fields and descent in algebraic dynamics, II

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This second part of the paper strengthens the descent theory described in the first part to rational maps, arbitrary base fields, and dynamics given by correspondences. We obtain in particular a decomposition of any difference field extension into a tower of finite, field-internal and one-based difference field extensions. This is needed in order to obtain the "dynamical Northcott" Theorem 1.11 of Part I in sharp form.
Revised version; some corrections related to purely inseparable descent, with thanks to referee

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Logic, Algebraic Geometry, 03C60, 12H10, 14GXX

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http://salesiana.dossiersoluciones.com/handle/123456789/164097

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0711.3865
 http://arxiv.org/abs/0711.3865

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arXiv