Mathematische Annalen

, Volume 325, Issue 4, pp 795–828 | Cite as

Analytic morphisms of t-motives

  • Francis Gardeyn


 Let K be a complete valued field, containing the finite field 𝔽 q . For abelian t-modules E and E' defined over K, we define an analytic morphism to be a rigid analytic entire homomorphism of the underlying groups which respect the action of t, and we denote the group of such analytic morphisms by Homan(E,E'). On the other hand, denoting the ring of entire functions on K in one variable t by K〈〈t〉〉, the group of analytic morphisms
between two τ-modules M and M' over K[t] is defined as the group of K〈〈t〉〉-linear homomorphism
commuting with the respective actions of τ. In this paper, we prove that for pure abelian t-modules E and E' with respective t-motives M(E) and M(E'), there exists a bijection
In other words, the categories of pure abelian t-modules and pure t-modules, both endowed with analytic morphisms, are antiequivalent. The most prominent instance of this phenomenon is given by the Tate uniformization map of Drinfeld modules at places of bad reduction, which, as we show, induces an interesting analytic description of the associated t-motive.


Tate Analytic Description Entire Function Finite Field Respective Action 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Francis Gardeyn
    • 1
  1. 1.ETH Zürich, D-MATH, Rämistrasse 101, 8092 Zürich, Switzerland (e-mail:

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