317 citations · 2.6k across the 36 of their papers we have counts for
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gr-qc2005★ 54 cited
Hyperbolicity of second-order in space systems of evolution equations
Carsten Gundlach, Jose M. Martin-Garcia
A possible definition of strong/symmetric hyperbolicity for a second-order system of evolution equations is that it admits a reduction to first order which is strongly/symmetric hy…
gr-qc2005★ 317 cited
Constraint damping in the Z4 formulation and harmonic gauge
Carsten Gundlach, Jose M. Martin-Garcia, Gioel Calabrese +1
We show that by adding suitable lower-order terms to the Z4 formulation of the Einstein equations, all constraint violations except constant modes are damped. This makes the Z4 for…