proposition: Lemma eta1E (C : convType) : eta1 C = @necset1 _ :> (_ -> _).
proof: Proof. by rewrite /eta1; unlock. Qed.
imports: Reals mathcomp(all_ssreflect) mathcomp(boolp classical_sets) mathcomp(finmap) infotheo(Reals_ext classical_sets_ext ssrR ssr_ext) infotheo(fdist fsdist convex necset) monae_lib HB(structures) category