Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational Wave Test of the Strong Equivalence Principle   The Strong Equivalence Principle (SEP) holds the full essence and meaning of
the General Theory of Relativity as the nonlinear relativistic theory of
gravitation. It asserts the universal coupling of gravity to all matter and its
interactions including the gravitational interaction and the gravitational self
energy. We point out that confirming the gravitational coupling to gravitons,
and hence to the gravitational waves, is the direct test of the SEP. We show
that the near simultaneous detection of gravitational waves and gamma rays from
the merger of binary neutron stars provides a unique and the most precise test
of the SEP, better than a part in $10^{9}$, which is also the only test of the
SEP in the radiation sector.

13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th