Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Divergence et parall\'elisme des rayons d'\'etirement cylindriques   A cylindrical stretch line is a stretch line, in the sense of Thurston, whose
horocyclic lamination is a weighted multicurve. In this paper, we show that two
correctly parameterized cylindrical lines are parallel if and only if these
lines converge towards the same point in Thurston's boundary of Teichm\"uller
space.

33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph