proposition: Lemma words2ch_ch2words : ∀ x, words2ch (ch2words x) = x.
proof: Proof. intros x. unfold words2ch, ch2words. destruct x. f_equal. apply bool_irrelevance. Qed.
imports: Relational(OrderEnrichedCategory GenericRulesSimple) mathcomp(all_ssreflect all_algebra reals distr fingroup.fingroup realsum ssrnat ssreflect ssrfun ssrbool ssrnum eqtype choice seq) Crypt(Axioms ChoiceAsOrd SubDistr Couplings UniformDistrLemmas FreeProbProg Theta_dens RulesStateProb UniformStateProb pkg_composition pkg_rhl Package Prelude) Coq(Utf8 Lia) extructures(ord fset fmap) Equations(Equations)