Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Varied Avatars of Time-delay Interferometry   Time-Delay Interferometry (TDI) is the data processing technique that cancels
the large laser phase fluctuations affecting the one-way Doppler measurements
made by unequal-arm space-based gravitational wave interferometers. By taking
finite linear combinations of properly time-shifted Doppler measurements, laser
phase fluctuations are removed at any time t and gravitational wave signals can
be studied at a requisite level of sensitivity. In the past, other approaches
to this problem have been proposed. Recently, matrix based approaches have been
put forward; two such approaches are by Vallisneri et al. and Tinto, Dhurandhar
and Joshi. In this paper we establish a close relationship between these
approaches. In fact we show that the matrices involved in defining the
operators in the two approaches exhibit an isomorphism and therefore in both
approaches one is dealing with matrix representations of the time-delay
operators.

31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics