Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Twistor cosmology and quantum space-time   The purpose of this paper is to present a model of a quantum space-time in
which the global symmetries of space-time are unified in a coherent manner with
the internal symmetries associated with the state space of quantum-mechanics.
If we take into account the fact that these distinct families of symmetries
should in some sense merge and become essentially indistinguishable in the
unified regime, our framework may provide an approximate description of or
elementary model for the structure of the universe at early times.

32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an