22 citations · 50 across the 3 of their papers we have counts for
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gr-qc2004★ 22 cited
The Constraint Equations
Robert Bartnik, Jim Isenberg
We review the properties of the constraint equations, from their geometric origin in hypersurface geometry through to their roles in the Cauchy problem and the Hamiltonian formulat…
gr-qc2004★ 7 cited
Phase space for the Einstein equations
Robert Bartnik
A Hilbert manifold structure is described for the ADM phase space of asymptotically flat initial data with local Sobolev regularity. Solutions of the constr…