proposition: Lemma dlimC mu : \dlim_(n) mu =1 mu.
proof: Proof. by move=> x; rewrite !dlimE; rewrite nlimC. Qed.
imports: mathcomp(all_ssreflect all_algebra) mathcomp.classical(boolp classical_sets mathcomp_extra) xfinmap ereal reals discrete topology realseq realsum