Dutch student Arend Moerman (Leiden University, the Netherlands) has defended his thesis research on the simulation of chaotic interactions of three black holes. The simulations, which he carried out together with researchers from Leiden and Oxford, show that lighter black holes tend to slingshot each other out into space, while heavier ones tend to merge. The research will be published in the leading journal Physical Review D.
source https://phys.org/news/2021-10-simulating-chaotic-interactions-black-holes.html