Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hubble Redshift   The dependence of luminosity distance on observed resdhift and the
cosmological parameters H and q is derived for a contracting Friedmann universe
with no cosmological constant. The result is consistent with recent supernovae
observations.

19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg