Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Freedman-Townsend vertex from Hamiltonian BRST cohomology   Consistent interactions among a set of two-form gauge fields in four
dimensions are derived along a Hamiltonian cohomological procedure. It is shown
that the deformation of the BRST charge and BRST-invariant Hamiltonian for the
free model leads to the Freedman-Townsend interaction vertex. The resulting
interaction deforms both the gauge transformations and reducibility relations,
but not the algebra of gauge transformations.

37
The categories of this paper are: supr-con
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat