Could the Universe have an Exotic Topology?

A recent article uncovered a surprising dynamical mechanism at work within the (vacuum) Einstein `flow’ that strongly suggests that many closed 3-manifolds that do not admit a locally homogeneous and isotropic metric $\mathit{\text{at}}\mathit{\text{all}}$ will nevertheless evolve, under Einsteinian evolution, in such a way as to be $\mathit{\text{asymptotically}}$ compatible with the observed, approximate, spatial homogeneity and isotropy of the universe \cite{Moncrief:2015}. Since this previous article, however, ignored the potential influence of $\mathit{\text{dark-energy}}$ and its correspondent accelerated expansion upon the conclusions drawn, we analyze herein the modifications to the foregoing argument necessitated by the inclusion of a $\mathit{\text{positive}}$ cosmological constant — the simplest viable model for dark energy.