Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On intrinsic symmetry in Gurzadyan-Xue cosmological models   Analysis of cosmological solutions of GX dark energy models shows the
presence of a separatrix in the phase space of solutions which divides them
into two classes: Friedmannian-like with initial singularity and
non-Friedmannian solutions. The invariants are found, that reveal the intrinsic
symmetry in GX models.

31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin