Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Congruent number elliptic curves with rank at least two   We give an infinite family of congruent number elliptic curves, each with
rank at least two, which are related to integral solutions of $m^2=n^2+nl+l^2$.

31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn