A **Cauchy surface** is a concept used in the context of general relativity and differential geometry, particularly in the study of spacetime. It is a type of hypersurface that has important implications for the determination of the evolution of physical fields and signals in spacetime.
Articles by others on the same topic
A Cauchy hypersurface is an achronal hypersurface met exactly once by every inextendible timelike curve. Its topology records the global spatial topology of a globally hyperbolic spacetime.