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Commit 879227e9 authored by BOLDO Sylvie's avatar BOLDO Sylvie


parent cc3b1505
......@@ -1057,29 +1057,6 @@ End Hyp_ok.
Section Delta_FLT.
Open Scope R_scope.
(* moved in Flocq core library... *)
Lemma round_NE_abs:
forall (beta : radix) (fexp : Z -> Z),
Valid_exp fexp ->
forall x : R,
round beta fexp ZnearestE (Rabs x) = Rabs (round beta fexp ZnearestE x).
Proof with auto with typeclass_instances.
intros beta fexp H1 x.
apply sym_eq.
unfold Rabs at 2.
destruct (Rcase_abs x) as [Hx|Hx].
rewrite round_NE_opp.
apply Rabs_left1.
rewrite <- (round_0 beta fexp ZnearestE).
apply round_le...
now apply Rlt_le.
apply Rabs_pos_eq.
rewrite <- (round_0 beta fexp ZnearestE).
apply round_le...
now apply Rge_le.
Variables a b c:R.
Variable beta : radix.
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