Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detection of Impulsive Light-Like Signals in General Relativity   The principal purpose of this paper is to study the effect of an impulsive
light-like signal on neighbouring test particles. Such a signal can in general
be unambiguously decomposed into a light-like shell of null matter and an
impulsive gravitational wave. Our results are: (a) If there is anisotropic
stress in the light-like shell then test particles initially moving in the
signal front are displaced out of this 2-surface after encountering the signal;
(b) For a light-like shell with no anisotropic stress accompanying a
gravitational wave the effect of the signal on test particles moving in the
signal front is to displace them relative to each other with the usual
distortion due to the gravitational wave diminished by the presence of the
light-like shell. An explicit example for a plane-fronted signal is worked out.

36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph