Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Regulators of Real Quadratic Number Fields   This paper deals with the quadratic integers of small norms and asserts that
in some sense R >> (log D)^2 is true for almost all real quadratic number
fields. (A few errata is corrected.)

5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs