6 citations · 14 across the 4 of their papers we have counts for
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gr-qc2002
Bianchi - Euler system for relativistice fluids and Bel - Robinson type energy
Yvonne Choquet-Bruhat, James W. York
We write a first order symmetric hyperbolic system coupling the Riemann with the dynamical acceleration of a relativistic fluid. W determine the associated, coupled, Bel - Robinson…
gr-qc2002
On H. Friedrich's formulation of Einstein'equations with fluid sources
Yvonne Choquet-Bruhat, James W. York
We establish a variant, which has the advantage of introducing only physical characteristics, of the symmetric quasi linear first order system given by H.\ Friedrich for the evolut…
gr-qc2002
Constraints and evolution in cosmology
Yvonne Choquet-Bruhat, James W. York
We review some old and new results about strict and non strict hyperbolic formulations of the Einstein equations.