proposition: Lemma B2SF_FF2B : forall x Bx, B2SF (FF2B x Bx) = FF2SF x.
proof: Proof. now intros [sx|sx|sx px|sx mx ex] Bx. Qed.
imports: Coq(ZArith Reals Psatz SpecFloat) Core Round Bracket Operations Div Sqrt Relative BinarySingleNaN