Invention of new particles (Duda-Vuyk) needed to build and transform a primordial Axion string and the origin of a cyclic universe.
How strings are able to merge at close distance.
The vacuum pressure ( Casimir) seems even the origin of black hole nucleus forming compacted by the vacuum pressure which is decreasing by vacuum dilution (eating) by merging black holes nuclei!!
In Q-FFF Theory the reducing vacuum pressure on the growing Big Crunch Black Hole, is reason to propose a cyclic universe,
see: https://vixra.org/author/leo_vuyk
As the diluted vacuum pressure is in equilibrium with the internal pressure of the Big Crunch Black Hole nucleus it will explode into series of smaller black hole chunks, evaporating a new oscillating vacuum lattice and forming dual Herbig Haro systems to form stars in between. .