fact: Definition sub_flt_helper (xn yn zn : positive) (xyi : FF) := Zle_bool (Zpos xn) (Zpos zn) && Zle_bool (Zpos yn) (Zpos zn) && Fle2 (Float2 (-1) (-1)) (lower xyi) && Fle2 (upper xyi) (Float2 1 0).
imports: Flocq(Core Sterbenz) Gappa_common Gappa_round_aux