Cosmological initial data with localized anisotropic fluid perturbations can be generated by outward integration of the parabolic-hyperbolic constraints from regular data at the origin, eliminating boundary conditions.
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Cosmological initial data without periodic boundary conditions
Cosmological initial data with localized anisotropic fluid perturbations can be generated by outward integration of the parabolic-hyperbolic constraints from regular data at the origin, eliminating boundary conditions.