Answers are grounded in this paper and cite their sources.
Rigid motions of collections of particles as defined by Born, Herglotz, and Noether are studied in special and general relativity. An approximate method for solving the field equations of general relativity, the equations of motion of a perfect fluid undergoing a rigid motion, and the boundary condition $p=0$ is described and the first-order solution for the first two sets of equations is obtained. It is shown that in the classical limit the boundary conditions may be satisfied to this order.
No takes yet. Share an insight, caveat, or question.
Salzman et al. (1954) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: