Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Triple lines on a cubic threefold   The present paper deals with lines contained in a smooth complex cubic
threefold. It is well-known that the set of lines of the second type on a cubic
threefold is a curve on its Fano surface. Here we give a description of the
singularities of this curve.

26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph