Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tangencial base points on algebraic stacks   The notion of tangencial base point is well-known for schemes in
characteristic zero. We show that the definition in terms of Puiseux series
generalizes to the case of Deligne--Mumford stacks, over a field of arbitrary
characteristic. We then apply this construction to moduli spaces of smooth
curves, generalizing a result of Ihara-Nakamura.

19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
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