simp [cons_toList, ih]
case cons
V : Type u
E : Type v
inst✝¹ : DecidableEq V
inst✝ : DecidableEq E
G✝ : Graph V E
u✝¹ v✝¹ w✝¹ : V
e✝¹ : EdgeBetween G✝ v✝¹ w✝¹
G : Graph V E
v w u v✝ w✝ u✝ : V
e✝ : EdgeBetween G v✝ w✝
p' : EdgePath G w✝ u✝
ih : ∀ (e : EdgeBetween G u✝ u), toList (concat p' e) = List.concat (toList p') e.edge
e : EdgeBetween G u✝ u
⊢ toList (concat (cons e✝ p') e) = List.concat (toList (cons e✝ p')) e.edge
no goals