proposition: Lemma cjordan_negE A : cjordan_neg A = - crestr0 nu mN A.
proof: Proof. by rewrite /= /cscale/= EFinN mulN1e. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum ssrint interval) mathcomp(finmap fingroup perm rat) mathcomp(mathcomp_extra boolp classical_sets cardinality) mathcomp(functions fsbigop set_interval) HB(structures) reals ereal signed topology numfun normedtype sequences esum measure realfun lebesgue_measure lebesgue_integral