α✝ : Type u
β : Type v
γ : Type w
α : Type u_1
inst✝ : AddGroup α
as : List α
⊢ map (Sub.sub default) as = neg as
α✝ : Type u
β : Type v
γ : Type w
α : Type u_1
inst✝ : AddGroup α
as : List α
⊢ sub [] as = neg as
rw [sub, @nil_pointwise _ _ _ ⟨0⟩ ⟨0⟩]
case e_f.h
α✝ : Type u
β : Type v
γ : Type w
α : Type u_1
inst✝ : AddGroup α
as : List α
x : α
⊢ Sub.sub default x = -x
α✝ : Type u
β : Type v
γ : Type w
α : Type u_1
inst✝ : AddGroup α
as : List α
⊢ map (Sub.sub default) as = neg as
congr with x
no goals
case e_f.h
α✝ : Type u
β : Type v
γ : Type w
α : Type u_1
inst✝ : AddGroup α
as : List α
x : α
⊢ Sub.sub default x = -x
exact zero_sub x