Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Black Hole Spectrum: Continuous or Discrete?   We formulate a qualitative argument, based on Heisenberg's uncertainty
principle, to support the claim that when the effects of matter fields are
assumed to overshadow the effects of quantum mechanics of spacetime, the
discrete spectrum of black hole radiation, as such as predicted by Bekenstein's
proposal for a discrete black hole area spectrum, reduces to Hawking's
black-body spectrum.

4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin