Fermi–Walker transport

Fermi-Walker transport is a concept in general relativity that describes how vectors (such as four-vectors) are transported along a curve in a curved spacetime. It is particularly useful in the context of allowing a parallel transport of vectors along a worldline in a way that respects the geometry of spacetime. The method is named after physicist Enrico Fermi and is often associated with the study of accelerated motion in general relativity.