156 citations · 905 across the 35 of their papers we have counts for
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gr-qc2005★ 9 cited
Gravitational energy
Joseph Katz
Observers at rest in a stationary spacetime flat at infinity can measure small amounts of rest-mass+internal energies+kinetic energies+pressure energy in a small volume of fluid at…
gr-qc2005★ 156 cited
Relativistic conservation laws and integral constraints for large cosmological perturbations
Joseph Katz, Jiri Bicak, Donald Lynden-Bell
For every mapping of a perturbed spacetime onto a background and with any vector field we construct a conserved covariant vector density , which is the divergence of a co…
gr-qc2005★ 12 cited
On the uniqueness of harmonic coordinates
Jiri Bicak, Joseph Katz
Harmonic coordinate conditions in stationary asymptotically flat spacetimes with matter sources have more than one solution. The solutions depend on the degree of smoothness of the…