proposition: Lemma __deprecated__dmargin_dlet (mu : {distr T / R}) (f : U -> V) (g : T -> {distr U / R}): dmargin f (\dlet_(t <- mu) g t) =1 \dlet_(t <- mu) (dmargin f (g t)).
proof: Proof. by apply/__deprecated__dlet_dlet. Qed.
imports: mathcomp(all_ssreflect all_algebra) mathcomp.classical(boolp classical_sets mathcomp_extra) xfinmap ereal reals discrete topology realseq realsum