Abstract
The use of time-like geodesics to measure temporal distances is better justified than the use of space-like geodesics for a measurement of spatial distances. We give examples where a “spatial distance” cannot be appropriately determined by the length of a space-like geodesic.
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Schmidt, H.J. How should we measure spatial distances?. Gen Relat Gravit 28, 899–903 (1996). https://doi.org/10.1007/BF02104755
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DOI: https://doi.org/10.1007/BF02104755