Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relating a small decrease of (m_p/m_e) with cosmological time to a small
  cosmological constant   The possible small variation downward by about $10^{-5}$, of the ratio of the
proton mass to the electron mass, over cosmological time is related to the
decrease with time of a small vacuum expectation value for a Goldstone-like
pseudoscalar field. The initial vacuum expectation value controls the magnitude
of a very small cosmological constant.

27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph