closed timelike loop → κλειστός χρονοειδής βρόχοςRotating black holes
*The Kerr-Newman (KN) geometry describes the geometry of empty space around a spinning, possibly charged, black hole.
*Real black holes probably spin.
*Centrifugal force causes the KN geometry to be gravitationally repulsive in its core.
*The phenomenology of the KN geometry is quite similar to that of the RN geometry: the gravitational repulsion causes the KN geometry to have both inner and outer horizons, and blackhole-wormhole-whitehole connections to new universes.
*The KN geometry is, again, inconsistent, because the black hole cannot be empty in its core if the core is repulsive.
*The singularity of the KN geometry forms a ring, kept open by the centrifugal force.
*The outer horizon and inner horizon are confocal ellipsoids, with the ring singularity at the focus.
*The other side of the disk bounded by the ring singularity is a new region, the "antiverse", at negative radius. In the antiverse, the black hole appears to have negative mass.
In the antiverse, circles around the axis near the disk are timelike. These circles form "closed timelike loops" (CTLs), where time keeps repeating itself.
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