proposition: Lemma fdist10 (a a0 : A) : a0 != a -> fdist1 a a0 = 0 :> R.
proof: Proof. by move=> a0a; rewrite fdist1E (negbTE a0a). Qed.
imports: mathcomp(all_ssreflect ssralg fingroup perm matrix) mathcomp(all_algebra vector reals normedtype) mathcomp(mathcomp_extra boolp) mathcomp(Rstruct) ssrR logb realType_ext ssr_ext ssralg_ext bigop_ext