Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the emergence of the structure of Physics   We consider Hilbert's problem of the axioms of Physics at a qualitative or
conceptual level. This issue is more pressing than ever as we seek to
understand how both General Relativity and quantum theory could emerge from
some deeper theory of quantum gravity, and in this regard I have previously
proposed a `principle of self-duality' or `quantum Born reciprocity' as a key
structure. Here I outline some of my recent work around the idea of quantum
spacetime as motivated by this non-standard philosophy, including a new toy
model of gravity on a spacetime consisting of four points forming a square.

12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con