Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic Jerk and Snap in Penrose's CCC model   We obtain a constraint on cosmological scalars for the FRW metric with a pure
radiation fluid source and positive cosmological constant. We demonstrate that
this constraint is conformally invariant in the context of Penrose's Conformal
Cyclic Cosmology proposal, where the metrics of the late stages of the previous
aeon and the early stages of the present aeon are described by FRW cosmologies.

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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: math
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The categories of this paper are: hep-ph