Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unitarity in Infinite Derivative Theories   In this paper, we consider an infinite derivative scalar field action with
infinite derivative kinetic and interaction terms. We establish that the theory
is unitary if the correlation functions are formulated in Euclidean space and
then analytically continued in their external momenta to Minkowski space.

2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph