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Abstract: We consider the 3+1-dimensional locally finite gravity model proposed by -tHooft. In particular we revisit the problem of resolving collisions of stringdefects. We provide a new geometric description of the configurations ofstrings using piecewise flat manifolds, and use it to resolve a more generalclass of collisions. We argue that beyond certain bounds for thedeficiency-surplus angles no resolutions may be found that satisfy the imposedcausality conditions.



Autor: Maarten van de Meent

Fuente: https://arxiv.org/







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