Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Champs de Hurwitz   On construit les champs de Hurwitz et on en donne quelques propri\'et\'es,
essentiellement contenues dans SGA 1. Quelques applications de nature
arithm\'etique en sont d\'eduites.
  We propose a construction of Hurwitz stacks and give some properties of them,
most of which are consequences of SGA 1. Some applications of arithmetic flavor
are then deduced.

30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat