Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Mass Quantum and Black Hole Entropy   We give a method in which a quantum of mass equal to twice the Planck mass
arises naturally. Then using Bose-Einstein statistics we derive an expression
for the black hole entropy which physically tends to the Bekenstein-Hawking
formula.

31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat