Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three-loop on-shell Feynman integrals with two masses   All three-loop on-shell QCD Feynman integrals with two masses can be reduced
to 27 master integrals. Here we calculate these master integrals, expanded in
epsilon, both exactly in the mass ratio and as series in limiting cases.

9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an