proposition: Theorem round_round_minus_radix_ge_3_FLX : (3 <= beta)%Z -> forall choice1 choice2, (2 * prec <= prec')%Z -> forall x y, FLX_format beta prec x -> FLX_format beta prec y -> round_round_eq (FLX_exp prec) (FLX_exp prec') choice1 choice2 (x - y).
proof: Proof. intros Hbeta choice1 choice2 Hprec x y Fx Fy. apply round_round_minus_radix_ge_3. - exact Hbeta. - now apply FLX_exp_valid. - now apply FLX_exp_valid. - now apply FLX_round_round_plus_radix_ge_3_hyp. - now apply generic_format_FLX. - now apply generic_format_FLX. Qed.
imports: Coq(ZArith Reals Psatz) Core FTZ