Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some cosmological features of 4D Gauss-Bonnet gravity with varying
  cosmological constant   We explore some cosmological features of the newly suggested 4D Gauss-Bonnet
gravity through two different models assuming a varying cosmological constant.
Observational constraints, such as the cosmic transit and the flat curvature,
have been considered in constructing the models. The cosmology in the current
work has been probed using a given scale factor derived from the desired cosmic
behavior which is the inverse of the usual viewpoint. The stability and
cosmography have been studied for the two models.

34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
2
The categories of this paper are: math