Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Induced-gravity Inflation and the Density Perturbation Spectrum   Recent experimental determinations of the spectral index describing the
scalar mode spectrum of density perturbations encourage comparison with
predictions from models of the very early universe. Unlike extended inflation,
Induced-gravity Inflation predicts a power spectrum with $0.98 \leq n_s \leq
1.00$, in close agreement with the experimental measurements.

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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th