Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Implication of GW170817 for cosmological bounces   The detection of GW170817 and its electromagnetic counterpart has revealed
the speed of gravitational waves coincides with the speed of light, $c_T=1$.
Inspired by the possibility that the physics implied by GW170817 might be
related with that for the primordial universe, we construct the spatially flat
stable (throughout the whole evolution) nonsingular bounce models in the beyond
Horndeski theory with $c_T=1$ and in the degenerate higher-order scalar-tensor
(DHOST) theory with $c_T=1$, respectively. Though it constricts the space of
viable models, the constraint of $c_T=1$ makes the procedure of building models
simpler.

28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph