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On a zero-gravity limit of the Kerr–Newman spacetimes and their electromagnetic fields
We discuss the limit of vanishing G (Newton’s constant of universal gravitation) of the maximal analytically extended Kerr–Newman electrovacuum spacetimes represented in Boyer–Lindquist coordinates. We investigate the topologically nontrivial spacetime M0 emerging in this limit and show that it consists of two copies of flat Minkowski spacetime cross-linked at a …