Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Infrared regular representation of the three dimensional massless Nelson
  model   We prove that in the Euclidean representation of the three dimensional
massless Nelson model the t = 0 projection of the interacting measure is
absolutely continuous with respect to a Gaussian measure with suitably adjusted
mean. We also determine the Hamiltonian in the Fock space over this Gaussian
measure space.

22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys