Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On some invariants of cubic fourfolds   For a general cubic fourfold $X \subset \mathbb{P}^5$, we compute the Hodge
numbers of the locus $S \subset F$ of lines of second type. We also give an
upper bound of 6 for the degree of irrationality of the Fano scheme of lines of
any smooth cubic hypersurface.

5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph