2 papers
gr-qc1996
Geometrical Hyperbolic Systems for General Relativity and Gauge Theories
A. Abrahams, A. Anderson, Y. Choquet-Bruhat +1
The evolution equations of Einstein's theory and of Maxwell's theory---the latter used as a simple model to illustrate the former--- are written in gauge covariant first order symm…
gr-qc1995
Einstein and Yang-Mills theories in hyperbolic form without gauge-fixing
A. Abrahams, A. Anderson, Y. Choquet-Bruhat +1
The evolution of physical and gauge degrees of freedom in the Einstein and Yang-Mills theories are separated in a gauge-invariant manner. We show that the equations of motion of th…