exact edges_snd_mem_support_of_mem_darts _ he
V : Type u
V' : Type v
V'' : Type w
G : Digraph V
G' : Digraph V'
G'' : Digraph V''
t u v w : V
p : Walk G v w
he : (t, u) ∈ edges p
⊢ u ∈ support p
no goals