tauto
V : Type u
V' : Type v
V'' : Type w
G : Digraph V
G' : Digraph V'
G'' : Digraph V''
u v : V
p : Walk G v u
h : G.Adj u v
this : List.Nodup (support p) → List.Nodup (edges p)
⊢ (¬(u, v) ∈ edges p ∧ List.Nodup (edges p)) ∧ cons h p ≠ nil ∧ List.Nodup (support p) ↔
    List.Nodup (support p) ∧ ¬(u, v) ∈ edges p
no goals