proposition: Lemma fsdist1E a0 : fsdist1 a0 = if a0 \in D then 1 else 0.
proof: Proof. by rewrite /fsdist1; unlock; rewrite fsfunE. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrnum) mathcomp(finmap) Reals mathcomp(mathcomp_extra) mathcomp(classical_sets boolp cardinality Rstruct reals) mathcomp(ereal topology esum measure probability) ssrR realType_ext Reals_ext ssr_ext ssralg_ext bigop_ext fdist convex