[GOAL]
C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
E : Type u₃
inst✝ : Category.{v₃, u₃} E
X : (C × D) × E
⊢ (𝟭 ((C × D) × E)).obj X = (associator C D E ⋙ inverseAssociator C D E).obj X
[PROOFSTEP]
simp
[GOAL]
C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
E : Type u₃
inst✝ : Category.{v₃, u₃} E
X : C × D × E
⊢ (inverseAssociator C D E ⋙ associator C D E).obj X = (𝟭 (C × D × E)).obj X
[PROOFSTEP]
simp
[GOAL]
C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
E : Type u₃
inst✝ : Category.{v₃, u₃} E
⊢ IsEquivalence (associativity C D E).functor
[PROOFSTEP]
infer_instance
[GOAL]
C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
E : Type u₃
inst✝ : Category.{v₃, u₃} E
⊢ IsEquivalence (associativity C D E).inverse
[PROOFSTEP]
infer_instance
