The Penrose cut-and-paste method is generalized to null thin shells with arbitrary matter content, including pressure and energy flux, via a locally Lipschitz metric and a Dirac-delta coordinate transformation.
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Generalizing the Penrose cut-and-paste method: Null shells with pressure and energy flux
The Penrose cut-and-paste method is generalized to null thin shells with arbitrary matter content, including pressure and energy flux, via a locally Lipschitz metric and a Dirac-delta coordinate transformation.