Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the classification of singular flat structures on surfaces   We study in this work flat surfaces with conical singularities, that is,
surfaces provided with a flat structure with conical singular points. Finding
good parameters for these surfaces in the general case is an open question. We
give an answer to this question in the case of flat structures on pairs of
pants with one singular point. The question of decomposability of an arbitrary
flat surface into flat pairs of pants is discussed.

18
The categories of this paper are: econ
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci