## Causal structures and causal boundaries

- Alfonso Garćıa-Parrado, José M. M. Senovilla
- 2005

General definitions for causal structures on manifolds of dimension d + 1 > 2 are presented for the topological category and for any differentiable one. Locally, these are given as cone structures via local (pointwise) homeomorphic or diffeomorphic abstraction from the standard null cone variety in IR. Weak () and strong () local cone (LC) structures refer… (More)

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