proposition: Lemma right_continuousW (R : numFieldType) (f : R -> R) : continuous f -> right_continuous f.
proof: Proof. by move=> cf x; apply: cvg_within_filter; exact/cf. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum ssrint interval) mathcomp(finmap fingroup perm rat) HB(structures) mathcomp.classical(mathcomp_extra boolp classical_sets) mathcomp.classical(functions fsbigop cardinality) reals ereal signed topology numfun normedtype sequences esum real_interval measure realfun