Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Instanton representation of Plebanski gravity XXII. Minisuperspace
  quantization of gravity coupled to spin 1/2 fermionic fields   In this paper we carry out a quantization of gravity coupled to massless spin
1/2 fermions through the instanton representation of Plebanski gravity. We have
constructed a Hilbert space of states for this model, and we have computed the
Hamilton's equations of motion. The classical equations appear, at a
superficial level, to be consistent with the quantum dynamics of the theory.

8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int