Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic Growth and Expansion Conjoined   Cosmological measurements of both the expansion history and growth history
have matured, and the two together provide an important test of general
relativity. We consider their joint evolutionary track, showing that this has
advantages in distinguishing cosmologies relative to considering them
individually or at isolated redshifts. In particular, the joint comparison
relaxes the shape degeneracy that makes $f\sigma_8(z)$ curves difficult to
separate from the overall growth amplitude. The conjoined method further helps
visualization of which combinations of redshift ranges provide the clearest
discrimination. We examine standard dark energy cosmologies, modified gravity,
and "stuttering" growth, each showing distinct signatures.

14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex