Theorem: CategoryTheory.DifferentialObject.mkIso_inv_f
File: Mathlib/CategoryTheory/DifferentialObject.lean

Proof steps:
state_before: S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ Y.d ≫ (shiftFunctor C 1).map f.inv = f.inv ≫ X.d
state_after: no goals
tactic: rw [← Functor.mapIso_inv, Iso.comp_inv_eq, Category.assoc, Iso.eq_inv_comp, Functor.mapIso_hom,
      hf]
state_before: S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ { f := f.hom, comm := hf } ≫ { f := f.inv, comm := ⋯ } = 𝟙 X
state_after: case w
S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ autoParam (({ f := f.hom, comm := hf } ≫ { f := f.inv, comm := ⋯ }).f = (𝟙 X).f) _auto✝
tactic: ext1
state_before: case w
S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ autoParam (({ f := f.hom, comm := hf } ≫ { f := f.inv, comm := ⋯ }).f = (𝟙 X).f) _auto✝
state_after: case w
S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ autoParam (f.hom ≫ f.inv = 𝟙 X.obj) _auto✝
tactic: dsimp
state_before: case w
S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ autoParam (f.hom ≫ f.inv = 𝟙 X.obj) _auto✝
state_after: no goals
tactic: exact f.hom_inv_id
state_before: S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ { f := f.inv, comm := ⋯ } ≫ { f := f.hom, comm := hf } = 𝟙 Y
state_after: case w
S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ autoParam (({ f := f.inv, comm := ⋯ } ≫ { f := f.hom, comm := hf }).f = (𝟙 Y).f) _auto✝
tactic: ext1
state_before: case w
S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ autoParam (({ f := f.inv, comm := ⋯ } ≫ { f := f.hom, comm := hf }).f = (𝟙 Y).f) _auto✝
state_after: case w
S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ autoParam (f.inv ≫ f.hom = 𝟙 Y.obj) _auto✝
tactic: dsimp
state_before: case w
S : Type u_1
inst✝⁴ : AddMonoidWithOne S
C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasShift C S
inst✝ : (shiftFunctor C 1).PreservesZeroMorphisms
X Y : DifferentialObject S C
f : X.obj ≅ Y.obj
hf : X.d ≫ (shiftFunctor C 1).map f.hom = f.hom ≫ Y.d
⊢ autoParam (f.inv ≫ f.hom = 𝟙 Y.obj) _auto✝
state_after: no goals
tactic: exact f.inv_hom_id