de Sitter SpaceTime’s maximally symmetric
curving constantly positive solves vacuum
equations for Einstein’s cosmological
constant resolve,
observationally relevant.
Approximates early universal inflation,
accounts for an energy density
relational increase to cosmic expansion.

On entering a second de Sitter phase:
a transition from a large cosmic constant
with a tiny radius of curvature
to the future de Sitter dark energy
emergent of the constant current;
enormous,
the radius of curvature close to Hubble scale.

*[ WSB ]_.