intro w
case h
α qs : Type
M : DFA α qs
⊢ ∀ (x : Word { x // x ∈ M.Z }), x ∈ DFA.AcceptedLanguage M ↔ x ∈ DFA.AcceptedLanguage (DFA.toTotalDFA M).toDFA
case h
α qs : Type
M : DFA α qs
w : Word { x // x ∈ M.Z }
⊢ w ∈ DFA.AcceptedLanguage M ↔ w ∈ DFA.AcceptedLanguage (DFA.toTotalDFA M).toDFA