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Cari koleksi dengan cepat sesuai kebutuhan Anda.In this paper we argue that the well-known maximal extensions of the Kerr and Kerr–Newman spacetimes characterized by a specific gluing (on disks) of two asymptotically flat regions with ADM masses of opposite signs are physically inconsistent and actually non-analytic. We also discover a correct geometrical interpretation of the surface r = 0, t = const—a dicone in the case of the Kerr sol…