A large data result for vacuum Einstein's equations

Abstract

We prove a global well-posedness and asymptotic convergence theorem for the \((3+1)\)-dimensional vacuum Einstein equations with positive cosmological constant \(Λ\) on globally hyperbolic spacetimes \(\widetilde M \cong M \times \mathbb R\), where \(M\) is a closed three-manifold of negative Yamabe type. In constant-mean-curvature transported spatial coordinates, an open set of large initial data gives rise to future-global solutions whose renormalized spatial metrics converge smoothly to a limiting metric of constant negative scalar curvature. The key new ingredient is an integrable damping mechanism, induced by the cosmological constant in this gauge and absent in the \(Λ=0\) vacuum problem, which yields time-integrable decay for the nonlinear evolution. As a consequence, the Einstein--\(Λ\) flow does not in general canonically encode the Thurston geometrization of the underlying three-manifold. This confirms a conjecture of Ringström on the asymptotic topological indistinguishability of large-data Einstein--\(Λ\) dynamics. An analogous theorem is also proved for manifolds of positive Yamabe type, under an additional technical hypothesis.

Comments welcome, 66 pages, 1 figure