rfl
V : Type u
V' : Type v
V'' : Type w
G : Digraph V
G' : Digraph V'
G'' : Digraph V''
u'' v'' : V
p : Walk G u'' v''
⊢ Walk.copy (Walk.copy p (_ : u'' = u'') (_ : v'' = v'')) (_ : u'' = u'') (_ : v'' = v'') =
    Walk.copy p (_ : u'' = u'') (_ : v'' = v'')
no goals