Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A uniform estimate for the density of rational points on quadrics   This paper is concerned with the density of rational points of bounded height
lying on a variety defined by an integral quadratic form Q. In the case of four
variables, we give an estimate that does not depend on the coefficients of Q.
For more variables, a similar estimate still holds with the restriction that we
only count points which do not lie on rational lines.

8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph