... causal and chronological future J+(S) and I+(S), and thereby, in a standard way, the domain of influence and domain of dependence of an achronal set S.Given (u, v) ∈ D(U), a solution of the ... of a right-Iregion (strictly to the future of the point of intersection of the right-I and the corresponding left-I region) and parametrize the u =0line segment by0 ≤ v ≤ V with s =(0, 0) and ... of solutions to the initial value problem for certain equations of evolution. Indeed, in the context of the Einstein equations of general relativity, where the unknown is the very structure of...