proposition: Lemma leq_mx_lang_Union: forall k, M k <== mx_lang_Union.
proof: Proof. intro k. apply -> (mx_lang_Union_spec mx_lang_Union). reflexivity. Qed.
imports: Coq(List) ATBR(Common) ATBR(Classes) ATBR(Graph) ATBR(Monoid) ATBR(SemiLattice) ATBR(SemiRing) ATBR(KleeneAlgebra) ATBR(MxGraph) ATBR(MxSemiLattice) ATBR(MxSemiRing) ATBR(MxKleeneAlgebra) ATBR(Functors) ATBR(MxFunctors) ATBR(DKA_Definitions) ATBR(Model_Languages)