Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: (N+1)-dimensional Lorentzian evolving wormholes supported by polytropic
  matter   In this paper we study $(N+1)$-dimensional evolving wormholes supported by
energy satisfying a polytropic equation of state. The considered evolving
wormhole models are described by a constant redshift function and generalizes
the standard flat Friedmann-Robertson-Walker spacetime. The polytropic equation
of state allows us to consider in $(3+1)$-dimensions generalizations of the
phantom energy and the generalized Chaplygin gas sources.

30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
2
The categories of this paper are: math
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg