proposition: Lemma Bsign_Bopp : forall x, is_nan x = false -> Bsign (Bopp x) = negb (Bsign x).
proof: Proof. now intros [s|s| |s m e H]. Qed.
imports: Coq(ZArith Reals Psatz SpecFloat) Core Round Bracket Operations Div Sqrt Relative