Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Critical phenomena in gravitational collapse   This article reviews classical and quantum aspects of critical phenomena in
gravitational collapse. We pay special attention to the origin of the scaling
law for black hole mass, and to phase transitions in which black hole formation
turns on at finite mass. We present some new results for perfect fluids with
pressure proportional to density.

30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph