proposition: Theorem Bsign_FF2B : forall x H, Bsign (FF2B x H) = sign_FF x.
proof: Proof. now intros [sx|sx|sx plx|sx mx ex] H. Qed.
imports: Coq(ZArith Reals Psatz SpecFloat) Core Round Bracket Operations Div Sqrt Relative BinarySingleNaN