Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The resolvent of the Nelson Hamiltonian improves positivity   We prove that the resolvent of the renormalised Nelson Hamiltonian at fixed
total momentum P improves positivity in the (momentum) Fock-representation, for
every P. Our argument is based on an explcit representation of the renormalised
operator and its domain using interior boundary conditions.

36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con