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The free boundary problem in general relativity

gr-qc · 2026-06-16 · unverdicted · novelty 6.0

Treating singularities as free boundaries in the Einstein-Hilbert action yields boundary conditions excluding Kasner/BKL spacetimes while admitting conformally regular FLRW cosmologies sourced by 0 ≤ P < ρ fluids with reflecting perturbations.

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  • The free boundary problem in general relativity gr-qc · 2026-06-16 · unverdicted · none · ref 24

    Treating singularities as free boundaries in the Einstein-Hilbert action yields boundary conditions excluding Kasner/BKL spacetimes while admitting conformally regular FLRW cosmologies sourced by 0 ≤ P < ρ fluids with reflecting perturbations.