causal future

causal future

[¦kȯz·əl ′fyü·chər]
(relativity)
The causal future relative to a set of points S in a space-time M is the set of points in M which can be reached from S by future-directed timelike or null curves.
References in periodicals archive ?
Thus, an event e directly precedes an event e', if and only if no other event e" belonging to E exists, such that e" belongs at the same time to the causal future of e and to the causal past of e'.
In such worlds, there are closed, future-directed, timelike curves where we can "travel" in time by heading into our causal future and eventually arrive at our causal past or present.