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gr-qc2025
A first-order formulation of f(R) gravity in spherical symmetry
Philippe G. LeFloch, Filipe C. Mena
We develop an augmented characteristic, first-order formulation of the field equations in f(R) gravity governing the global evolution of a (possibly) massive scalar field phi under…
gr-qc2025
The global nonlinear stability of Minkowski spacetime with self-gravitating massive Dirac fields
Philippe G. LeFloch, Yue Ma, Weidong Zhang
We consider the Einstein-Dirac system for a massive field, which describes the evolution of self-gravitating massive spinor fields, and we investigate the global evolution problem,…