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Paper detail

The Carlitz shtuka

Recently we have used the Carlitz exponential map to define a finitely generated submodule of the Carlitz module having the right properties to be a function field analogue of the group of units in a number field. Similarly, we constructed a finite module analogous to the class group of a number field. In this short note more algebraic constructions of these "unit" and "class" modules are given and they are related to Ext modules in the category of shtukas.

preprint2010arXivOpen access
Lenny Taelman
math.NT
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Lenny Taelman

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