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The problem of singularities associated with Dirac strings and closedtimelike curves in classical solutions of pure gravity is analyzed here. Amethod to eliminate these is introduced and established first for the Taub-NUTgeometry. This is superceded by a smooth solution of first order fieldequations, which is defined to be a unique extension of the Taub Universe to adegenerate metric phase. As an additional feature, this framework naturallyprovides a geometric interpretation of the magnetic charge in the context ofgravity theory without matter. Finally, exploiting the two phases of the metricdeterminant, we find a (smooth and unique) continuation of the Misner geometryas well, ridding it of closed timelike worldlines which exist in its otherwiseEinsteinian manifestation.

Taming Dirac strings and timelike loops in vacuum gravity