Require Export TopologicalSpaces.
Require Export OrderTopology.
Require Export Reals.
Definition RTop := OrderTopology Rle.
Require Export MetricSpaces.
Definition R_metric (x y:R) : R := Rabs (y-x).

Lemma Ropp_continuous: continuous Ropp (X:=RTop) (Y:=RTop).
Require Export Connectedness.