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In this short note, a question of patching together globally hyperbolic manifolds is adressed which appeared in the context of the construction of Hadamard states.
Rainer Verch:
1993
Earlier work this paper cites.
M.J. Radzikowski:
1996
Cited alongside, same era.
Miguel Sánchez, Olaf Müller:
2011
Closest in time.
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