Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalization of brick wall method in Kerr-Newman Black Hole for
  entropy calculation   Using the brick wall method, we will calculate the entropy of Kerr-Newman
black Hole and arrive at the already well established result. During the
calculation, we will arrive at the generalized equation for FNSR and FSR mode
of free energy, which can be used to evaluate the free energy of any black
hole. And we will also show the detailed steps in our calculation to provide
clarification about how we calculated it.

6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat