apply list_direct_succ_set_closed_reachable_from_list g (dft_aux g stack [])
Node : Type
inst✝ : DecidableEq Node
g : Graph Node
stack : List Node
⊢ ↑(dft_aux g stack []).toFinset = reachable_from_list g (dft_aux g stack [])
Node : Type
inst✝ : DecidableEq Node
g : Graph Node
stack : List Node
⊢ list_direct_succ_set g (dft_aux g stack []) ⊆ ↑(dft_aux g stack []).toFinset