Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Cardy-Verlinde equation in a spherical symmetric gravitational
  collapse   The Cardy-Verlinde formula is analyzed in the contest of the gravitational
collapse. Starting from the holographic principle, we show how the equations
for a homogeneous and isotropic gravitational collapse describe the formation
of the black hole entropy. Some comments on the role of the entangled entropy
and the connection with the c-theorem are made.

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
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin