proposition: Lemma t3pos_: 0 <= t3.
proof: Proof. Proof with auto with typeclass_instances. apply FLT_pos_is_pos. apply Rplus_le_le_0_compat. exact cPos. apply FLT_pos_is_pos. apply Rle_0_minus. exact bLea. Qed.
imports: Coq(ZArith Reals Psatz) Flocq(Core Relative Sterbenz Operations) Interval(Tactic)