Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Laser Interferometer Space Antenna: Unveiling the Millihertz
  Gravitational Wave Sky   The first terrestrial gravitational wave interferometers have dramatically
underscored the scientific value of observing the Universe through an entirely
different window, and of folding this new channel of information with
traditional astronomical data for a multimessenger view. The Laser
Interferometer Space Antenna (LISA) will broaden the reach of gravitational
wave astronomy by conducting the first survey of the millihertz gravitational
wave sky, detecting tens of thousands of individual astrophysical sources
ranging from white-dwarf binaries in our own galaxy to mergers of massive black
holes at redshifts extending beyond the epoch of reionization. These
observations will inform - and transform - our understanding of the end state
of stellar evolution, massive black hole birth, and the co-evolution of
galaxies and black holes through cosmic time. LISA also has the potential to
detect gravitational wave emission from elusive astrophysical sources such as
intermediate-mass black holes as well as exotic cosmological sources such as
inflationary fields and cosmic string cusps.

10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin