Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The ultraviolet and infrared perturbative finiteness of massless QED$_3$   The massless QED$_3$ is ultraviolet and infrared perturbatively finite,
parity and infrared anomaly free to all orders in perturbation theory.

34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg