Light-cones, almost light-cones and almost-complex light-cones
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DOI: 10.1007/s10714-017-2264-1
Abstract: We point out (and then apply to a general situation) an unusual relationship among a variety of null geodesic congruences; (a) the generators of ordinary light-cones and (b) certain (related) shear-free but twisting congruences in… read more here.
Keywords: complex light; shear free; almost complex; almost light ... See more keywords