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- W1989466387 abstract "We show that if a change of spatial topology is mediated by a spacetime with an everywhere-non-singular metric of Lorentzian signature which admits a spinor structure, then the Kervaire semicharacteristic of the boundary plus the kink number of the Lorentzian metric on the boundary must vanish modulo 2. The kink number is a measure of how many times the light cone tips over on the boundary. It vanishes if the boundary is everywhere spacelike. This result gives a generalization of a previous selection rule: The number of wormholes plus the number of kinks created during a topology change is conserved modulo 2." @default.
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- W1989466387 date "1992-09-21" @default.
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- W1989466387 title "Kinks and topology change" @default.
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- W1989466387 doi "https://doi.org/10.1103/physrevlett.69.1719" @default.
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