An invariant for difference field extensions
classification
🧮 math.LO
keywords
degreeinvariantdifferenceextensionsfieldautomorphismdiscussdistant
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In this paper we introduce a new invariant (the distant degree) for difference field extensions of finite transcendence degree, and we explore some of its properties. We also discuss a generalisation of this invariant and of the limit degree to groups with an automorphism.
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