Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Equivalent Hamiltonian approach to quantum cosmology of integrable
  models   We propose an approach to quantum cosmology of integrable models. To analyze
the models with two dynamical variables, we introduce equivalent Hamiltonians
in reduced phase spaces, which are obtained with the aid of the Faddeev--Jackiw
method. Quantum dynamics of the models can be studied by using the equivalent
Hamiltonians with various techniques.

17
The categories of this paper are: q-fin
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn