proposition: Lemma lte_absl (x y : \bar R) : (`|x| < y)%E = (- y < x < y)%E.
proof: Proof. by move: x y => [x| |] [y| |] //=; rewrite ?lte_fin ?ltry ?ltNyr// ltr_norml. Qed.
imports: HB(structures) mathcomp(all_ssreflect all_algebra finmap) mathcomp(mathcomp_extra) signed