Abstract
We discuss some spacetimes, which are flat everywhere except for a thin shell of matter or a string of matter, in the framework of the Israel formalism. First we study spherically symmetric universes with a single sheet of matter. Then we show that the construction of a cosmic string as a limit of various thin shell distributions of matter leads to identical results.
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Langer, J., Žofka, M. Nearly everywhere flat spaces. Czech J Phys 52, 669–677 (2002). https://doi.org/10.1023/A:1015578527559
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DOI: https://doi.org/10.1023/A:1015578527559