Causal spaces, signal spaces and discrete space-times

Causal spaces, signal spaces and discrete space-times
P. Szekeres
in Proc. Fourth Monash General Relativity Workshop, eds. A. Lun, L. Brewin and E. Chow, (Monash University, 1994), pp. 113-121.

Space-times are generalized by constructing spaces whose structure is defined purely by a causal or signalling relation. It is shown how concepts similar to null geodesics (rays) and space-time topology may be defined for such spaces. Attention is focussed on discrete signal spaces, with a view to applications in numerical relativity and quantization.

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