Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dirac's Large Number Hypothesis and Quantized Friedman Cosmologies   This paper contains applications of the quantum theory for gravity developed
in the paper " A Sketch for a Quantum Theory of Gravity". Firstly, it is shown
that the theory gives a direct derivation of the implications of Dirac's large
number hypothesis. The three dimensionless large numbers are obtained as three
closed formulae with definite coefficients constructed from known physical
constants. Secondly, the theory is used to derive two quantum Friedman
cosmologies. The first of these Cosmologies is a very simple first
approximation involving a key angular parameter being zero and the second is a
more accurate one involving the same key parameter not being zero. The
cosmological constant plays a basic and fundamental part in the formalism with
very accurate agreement with measurement pertaining.

26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol