Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Broken Scale Invariance and Quintessence (a quarter of a century ago)   The cosmological consequences of a simple scalar field model for the
generation of Newton's constant through the spontaneous breaking of scale
invariance in a curved space-time are again presented and discussed. Such a
model leads to a consistent description wherein the introduction of matter
introduces a small perturbation on a de Sitter universe and a time dependence
of the gravitational coupling.

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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an