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math-ph2019★ 1 cited
On null geodesically complete spacetimes uder NEC and NGC; is the Gao-Wald "time dilation" a topological effect?
Kyriakos Papadopoulos
We review a theorem of Gao-Wald on a kind of a gravitational "time delay" effect in null geodesically complete spacetimes under NEC and NGC, and we observe that it is not valid any…
math.DG2019★ 7 cited
On sliced spaces: Global Hyperbolicity revisited
Kyriakos Papadopoulos, Nazli Kurt, Basil K. Papadopoulos
We give a topological condition for a generic sliced space to be globally hyperbolic, without any hypothesis on the lapse function, shift function and spatial metric.