Showed up in Penrose’s “The Fabric of Reality.” Curvature of spacetime is determined by infinitesimal light cones at each point. You can get a uniquely determined surface from a connection as well as a connection from a surface.
Obviously physicists totally know about causality being restricted to the light cone! And “curvature of space = light cones at each point” isn’t Penrose, it’s standard General Relativity.
I think probably Penrose’s “The Road to Reality” was intended. I don’t think there’s anything in the Deutsch book like “curvature of spacetime is determined by infinitesimal light cones”; I don’t think I’ve read the relevant bits of the Penrose but it seems like exactly the sort of thing that would be in it.
Showed up in Penrose’s “The Fabric of Reality.” Curvature of spacetime is determined by infinitesimal light cones at each point. You can get a uniquely determined surface from a connection as well as a connection from a surface.
Obviously physicists totally know about causality being restricted to the light cone! And “curvature of space = light cones at each point” isn’t Penrose, it’s standard General Relativity.
Not claiming it’s his own idea, just that it showed up in the book, I assume it’s standard.
David Deutsch, not Roger Penrose. Or wrong title.
I think probably Penrose’s “The Road to Reality” was intended. I don’t think there’s anything in the Deutsch book like “curvature of spacetime is determined by infinitesimal light cones”; I don’t think I’ve read the relevant bits of the Penrose but it seems like exactly the sort of thing that would be in it.
Page number?