induction p <;> cases p' <;> simp [*]
V : Type u
V' : Type v
V'' : Type w
G : Digraph V
G' : Digraph V'
G'' : Digraph V''
u v w : V
p : Walk G u v
p' : Walk G v w
⊢ support (append p p') = support p ++ List.tail (support p')
no goals