Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 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.

32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: funct-an