

2·
11 hours agoYou can see in the article in small the distribution probability of black hole masses from mergers. It’s just very improbable for BHs formed from dying stars to merge into one of a mass of hundreds of suns, but there they give some possible explanations.
In general the important big mass gap in BHs is the one between the ones formed from stars and the supermassive ones, which probably have a different origin.
If you were using nonstandard analysis with dx an infinitesimal you could put it outside I guess. Maybe with differential forms too?