theory Multiset_Typing_Lifting imports Natural_Magma_Typing_Lifting Multiset_Extra Abstract_Substitution.Functional_Substitution_Lifting begin locale mulitset_typing_lifting = typing_lifting where to_set = set_mset begin sublocale natural_magma_with_empty_typing_lifting where to_set = set_mset and plus = "(+)" and wrap = "λl. {#l#}" and add = add_mset and empty = "{#}" by unfold_locales simp end end