Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Holographic Views of the World   This note has been written on the occasion of Gerard 't Hooft's 60th birthday
celebration. It is not a technical paper but just a collection of discussions
that the three authors had with Gerard, mostly in relation with the idea of
holography and aspects of quantum black hole physics.

34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph