Possibility of a cold cosmological singularity in the spectrum of primordial black holes
Zel'dovich Ya.B., Starobinskii A.A.
We consider entropy generation accompanying evaporation of primordial black holes. Bounds are obtained on the number of black holes with mass Μ < 1013 g. It is shown that the initial cold matter, when transformed halfway into black holes with M~ 10" g, acquires the presently observable entropy after the black-hole evaporation.
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![](/ps/1818/article_27790_800_head.png "We consider entropy generation accompanying evaporation of primordial black holes. Bounds are obtained on the number of black holes with mass <b><i>Μ </i></b>< 10<sup>13</sup> g. It is shown that the initial cold matter, when transformed halfway into black holes with <b><i>M~ </i></b>10" g, acquires the presently observable entropy after the black-hole evaporation.")