https://www.academia.edu/49550046/The_Cold_Cyclic_Big_Bang_String_Theory_as_explosion_of_the_Big_Crunch_String_Black_Hole_with_Herbig_Haro_heating
also: https://vixra.org/pdf/2101.0131v2.pdf
Abstract,
In Quantum FFF Theory, it is postulated that the Big Bang was the cold Big Bang of a decaying String nucleus based Dark Matter Black Hole into smaller ones and heated up by equal sized dual Herbig Haro Black Hole systems with star forming and plasma jets in between.
Quantum FFF Theory: FFF means, Function Follows Form, from stringy particles to Herbig Haro systems: dual black holes equipped with a Fermion creating (plasma) and repelling horizon.
Both big bang black hole elements are examples of a violation of the second law of thermodynamics, the big bang explosion and also each fermion creating and repelling black hole horizon of each black hole and also dual Herbig Haro black hole systems .
NO singularity it was, but the explosion of a relative large string nucleus filled with primary strings compressed by the decreasing pressure of the primary string vacuum by eating it.
At the moment that the vacuum compression became equal to the internal pressure of the string nucleus, the BB explosion started.
I suggest that this string nucleus can be also called the Big Crunch black hole of a former (multi) universe.