Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Nature of Cosmic Time   Hamilton-Jacobi theory provides a natural starting point for a covariant
description of the gravitational field. Using a spatial gradient expansion, one
may solve for the phase of the wavefunction by using a line-integral in
superspace. Each contour of integration corresponds to a particular choice of
time-hypersurface, and each yields the same answer. In this way, one can
describe all time choices simultaneously. In an interesting application to
cosmology, I compute large-angle microwave background anisotropies and the
galaxy-galaxy correlation function associated with the scalar and tensor
fluctuations of power-law inflation.

23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn