intro ⟨qf, hdel, hf⟩
case mpr
α qs : Type
M : DFA α qs
w : Word { x // x ∈ M.Z }
⊢ (∃ qf ∈ del_star M (M.q₀, w), qf ∈ M.F) → w ∈ AcceptedLanguage M
case mpr
α qs : Type
M : DFA α qs
w : Word { x // x ∈ M.Z }
qf : { x // x ∈ M.Q }
hdel : qf ∈ del_star M (M.q₀, w)
hf : qf ∈ M.F
⊢ w ∈ AcceptedLanguage M