Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transient Instability of Rapidly Rotating Black Holes   We analytically study the linear response of a near-extremal Kerr black hole
to external scalar, electromagnetic, and gravitational field perturbations. We
show that the energy density, electromagnetic field strength, and tidal force
experienced by infalling observers exhibit transient growth near the horizon.
The growth lasts arbitrarily long in the extremal limit, reproducing the
horizon instability of extremal Kerr. We explain these results in terms of
near-horizon geometry and discuss potential astrophysical implications.

14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con