Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Primordial Black Holes in Matter-Dominated Eras: the Role of Accretion   We consider the role of secondary infall and accretion onto an initially
overdense perturbation in matter-dominated eras, like the one which is likely
to follow the end of inflation. We show that primordial black holes may form
through post-collapse accretion, namely the accretion onto an initial
overdensity whose collapse has not given rise to a primordial black hole.
Accretion may be also responsible for the growth of the primordial black hole
masses by orders of magnitude till the end of the matter-dominated era.

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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-alg
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: cmp-lg