mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.RingTheory.Localization.Module

Goal state before:
pp: R : Type u_1
Rₛ : Type u_2
inst✝¹⁰ : CommSemiring R
S : Submonoid R
inst✝⁹ : CommSemiring Rₛ
inst✝⁸ : Algebra R Rₛ
inst✝⁷ : IsLocalization S Rₛ
M : Type u_3
Mₛ : Type u_4
inst✝⁶ : AddCommMonoid M
inst✝⁵ : Module R M
inst✝⁴ : AddCommMonoid Mₛ
inst✝³ : Module R Mₛ
inst✝² : Module Rₛ Mₛ
inst✝¹ : IsScalarTower R Rₛ Mₛ
f : M →ₗ[R] Mₛ
inst✝ : IsLocalizedModule S f
ι : Type u_5
v : ι → M
hv : ∀ (s : Finset ι) (f g : ι → R), ∑ i ∈ s, f i • v i = ∑ i ∈ s, g i • v i → ∀ i ∈ s, f i = g i
t : Finset ι
g₁ g₂ : ι → Rₛ
i : ι
hi : i ∈ t
a : ↥S
fg : ι ⊕ ι → R
hfg :
  (∀ (x : ↥t), (algebraMap R Rₛ) (fg (Sum.inl ↑x)) = ↑a • g₁ ↑x) ∧
    ∀ (x : ↥t), (algebraMap R Rₛ) (fg (Sum.inr ↑x)) = ↑a • g₂ ↑x
eq : ↑a • ∑ i ∈ t, g₁ i • (⇑f ∘ v) i = ↑a • ∑ i ∈ t, g₂ i • (⇑f ∘ v) i
⊢ g₁ i = g₂ i

Tactic:
← t.sum_coe_sort,

Goal state after:
R : Type u_1
Rₛ : Type u_2
inst✝¹⁰ : CommSemiring R
S : Submonoid R
inst✝⁹ : CommSemiring Rₛ
inst✝⁸ : Algebra R Rₛ
inst✝⁷ : IsLocalization S Rₛ
M : Type u_3
Mₛ : Type u_4
inst✝⁶ : AddCommMonoid M
inst✝⁵ : Module R M
inst✝⁴ : AddCommMonoid Mₛ
inst✝³ : Module R Mₛ
inst✝² : Module Rₛ Mₛ
inst✝¹ : IsScalarTower R Rₛ Mₛ
f : M →ₗ[R] Mₛ
inst✝ : IsLocalizedModule S f
ι : Type u_5
v : ι → M
hv : ∀ (s : Finset ι) (f g : ι → R), ∑ i ∈ s, f i • v i = ∑ i ∈ s, g i • v i → ∀ i ∈ s, f i = g i
t : Finset ι
g₁ g₂ : ι → Rₛ
i : ι
hi : i ∈ t
a : ↥S
fg : ι ⊕ ι → R
hfg :
  (∀ (x : ↥t), (algebraMap R Rₛ) (fg (Sum.inl ↑x)) = ↑a • g₁ ↑x) ∧
    ∀ (x : ↥t), (algebraMap R Rₛ) (fg (Sum.inr ↑x)) = ↑a • g₂ ↑x
eq : ↑a • ∑ i, g₁ ↑i • (⇑f ∘ v) ↑i = ↑a • ∑ i, g₂ ↑i • (⇑f ∘ v) ↑i
⊢ g₁ i = g₂ i
Module: Mathlib.CategoryTheory.Limits.Shapes.Pullback.IsPullback.Basic

Goal state before:
pp: C : Type u₁
inst✝ : Category.{v₁, u₁} C
Z X Y P : C
f : Z ⟶ X
g : Z ⟶ Y
inl : X ⟶ P
inr : Y ⟶ P
h : IsPushout f g inl inr
inst : IsIso g
this : HasPushout f g
⊢ IsIso inl

Tactic:
← h.inl_isoPushout_inv

Goal state after:
C : Type u₁
inst✝ : Category.{v₁, u₁} C
Z X Y P : C
f : Z ⟶ X
g : Z ⟶ Y
inl : X ⟶ P
inr : Y ⟶ P
h : IsPushout f g inl inr
inst : IsIso g
this : HasPushout f g
⊢ IsIso (pushout.inl f g ≫ h.isoPushout.inv)
Module: Mathlib.RingTheory.Localization.BaseChange

Goal state before:
pp: R : Type u_7
S : Type u_8
inst✝⁵ : CommSemiring R
inst✝⁴ : CommSemiring S
inst✝³ : Algebra R S
A : Type u_9
inst✝² : CommSemiring A
inst✝¹ : Algebra R A
M : Submonoid R
inst✝ : IsLocalization M A
s : S
x : R
y : ↥M
⊢ s ⊗ₜ[R] mk' A x y = mk' (S ⊗[R] A) ((algebraMap R S) x * s) ⟨(algebraMap R S) ↑y, ⋯⟩

Tactic:
rw [IsLocalization.eq_mk'_iff_mul_eq, algebraMap_apply, Algebra.algebraMap_self,
    RingHomCompTriple.comp_apply, tmul_one_eq_one_tmul, tmul_mul_tmul, mul_one, mul_comm,
    IsLocalization.mk'_spec', algebraMap_apply, Algebra.algebraMap_self, RingHom.id_apply,
    ← Algebra.smul_def, smul_tmul, Algebra.smul_def, mul_one]

Goal state after:
Module: Mathlib.CategoryTheory.Limits.Shapes.Pullback.Pasting

Goal state before:
pp: case refine_2.h₀
C : Type u
inst✝ : Category.{v, u} C
X₁ X₂ X₃ Y₁ : C
f₁ : X₁ ⟶ X₂
f₂ : X₂ ⟶ X₃
i₁ : X₁ ⟶ Y₁
t₁ : PushoutCocone i₁ f₁
i₂ : X₂ ⟶ t₁.pt
t₂ : PushoutCocone «i₂» f₂
hi₂ : «i₂» = t₁.inr
H : IsColimit t₁
H' : IsColimit (t₁.pasteHoriz t₂ hi₂)
s : PushoutCocone «i₂» f₂
l : (t₁.pasteHoriz t₂ hi₂).pt ⟶ s.pt
hl : (t₁.pasteHoriz t₂ hi₂).inl ≫ l = t₁.inl ≫ s.inl
hl' : (t₁.pasteHoriz t₂ hi₂).inr ≫ l = s.inr
m : t₂.pt ⟶ s.pt
hm₁ : t₂.inl ≫ m = s.inl
hm₂ : t₂.inr ≫ m = s.inr
⊢ (t₁.pasteHoriz t₂ hi₂).inl ≫ m = (t₁.pasteHoriz t₂ hi₂).inl ≫ l

pp: case refine_2.h₁
C : Type u
inst✝ : Category.{v, u} C
X₁ X₂ X₃ Y₁ : C
f₁ : X₁ ⟶ X₂
f₂ : X₂ ⟶ X₃
i₁ : X₁ ⟶ Y₁
t₁ : PushoutCocone i₁ f₁
i₂ : X₂ ⟶ t₁.pt
t₂ : PushoutCocone «i₂» f₂
hi₂ : «i₂» = t₁.inr
H : IsColimit t₁
H' : IsColimit (t₁.pasteHoriz t₂ hi₂)
s : PushoutCocone «i₂» f₂
l : (t₁.pasteHoriz t₂ hi₂).pt ⟶ s.pt
hl : (t₁.pasteHoriz t₂ hi₂).inl ≫ l = t₁.inl ≫ s.inl
hl' : (t₁.pasteHoriz t₂ hi₂).inr ≫ l = s.inr
m : t₂.pt ⟶ s.pt
hm₁ : t₂.inl ≫ m = s.inl
hm₂ : t₂.inr ≫ m = s.inr
⊢ (t₁.pasteHoriz t₂ hi₂).inr ≫ m = (t₁.pasteHoriz t₂ hi₂).inr ≫ l

Tactic:
· simpa [← hm₁] using hl.symm

Goal state after:
case refine_2.h₁
C : Type u
inst✝ : Category.{v, u} C
X₁ X₂ X₃ Y₁ : C
f₁ : X₁ ⟶ X₂
f₂ : X₂ ⟶ X₃
i₁ : X₁ ⟶ Y₁
t₁ : PushoutCocone i₁ f₁
i₂ : X₂ ⟶ t₁.pt
t₂ : PushoutCocone «i₂» f₂
hi₂ : «i₂» = t₁.inr
H : IsColimit t₁
H' : IsColimit (t₁.pasteHoriz t₂ hi₂)
s : PushoutCocone «i₂» f₂
l : (t₁.pasteHoriz t₂ hi₂).pt ⟶ s.pt
hl : (t₁.pasteHoriz t₂ hi₂).inl ≫ l = t₁.inl ≫ s.inl
hl' : (t₁.pasteHoriz t₂ hi₂).inr ≫ l = s.inr
m : t₂.pt ⟶ s.pt
hm₁ : t₂.inl ≫ m = s.inl
hm₂ : t₂.inr ≫ m = s.inr
⊢ (t₁.pasteHoriz t₂ hi₂).inr ≫ m = (t₁.pasteHoriz t₂ hi₂).inr ≫ l
Module: Mathlib.Algebra.Module.LocalizedModule.Basic

Goal state before:
pp: R : Type u
inst✝⁸ : CommSemiring R
S : Submonoid R
M : Type v
inst✝⁷ : AddCommMonoid M
inst✝⁶ : Module R M
T : Type u_1
inst✝⁵ : CommSemiring T
inst✝⁴ : Algebra R T
inst✝³ : IsLocalization S T
T' : Type u_2
inst✝² : CommSemiring T'
inst✝¹ : Algebra R T'
inst✝ : IsLocalization S T'
s : ↥S
r : R
x : LocalizedModule S M
x✝¹ : M
x✝ : ↥S
⊢ mk (r • x✝¹) (x✝ * s) = mk ((RingHom.id R) r • x✝¹) (x✝ * s)

Tactic:
congr!

Goal state after:
Module: Mathlib.CategoryTheory.Monad.Products

Goal state before:
pp: C : Type u
inst✝¹ : Category.{v, u} C
X : C
inst✝ : HasBinaryProducts C
X✝ Y✝ : (prodComonad X).Coalgebra
f : X✝ ⟶ Y✝
⊢ f.f ≫ (Over.mk (Y✝.a ≫ prod.fst)).hom = (Over.mk (X✝.a ≫ prod.fst)).hom

Tactic:
by simp [← dsimp% f.h_assoc]

Goal state after:
Module: Mathlib.Algebra.Module.LocalizedModule.Basic

Goal state before:
pp: R : Type u_1
inst✝⁷ : CommSemiring R
S : Submonoid R
M : Type u_2
M' : Type u_3
M'' : Type u_4
inst✝⁶ : AddCommMonoid M
inst✝⁵ : AddCommMonoid M'
inst✝⁴ : AddCommMonoid M''
inst✝³ : Module R M
inst✝² : Module R M'
inst✝¹ : Module R M''
f : M →ₗ[R] M'
inst✝ : IsLocalizedModule S f
g : M →ₗ[R] M''
h : ∀ (x : ↥S), IsUnit ((algebraMap R (End R M'')) ↑x)
⊢ LocalizedModule.lift S g h ∘ₗ ↑(iso S f).symm ∘ₗ f = g

Tactic:
iso_symm_comp,

Goal state after:
R : Type u_1
inst✝⁷ : CommSemiring R
S : Submonoid R
M : Type u_2
M' : Type u_3
M'' : Type u_4
inst✝⁶ : AddCommMonoid M
inst✝⁵ : AddCommMonoid M'
inst✝⁴ : AddCommMonoid M''
inst✝³ : Module R M
inst✝² : Module R M'
inst✝¹ : Module R M''
f : M →ₗ[R] M'
inst✝ : IsLocalizedModule S f
g : M →ₗ[R] M''
h : ∀ (x : ↥S), IsUnit ((algebraMap R (End R M'')) ↑x)
⊢ LocalizedModule.lift S g h ∘ₗ LocalizedModule.mkLinearMap S M = g
Module: Mathlib.Algebra.Module.LocalizedModule.Basic

Goal state before:
pp: R : Type u_1
inst✝⁵ : CommSemiring R
S : Submonoid R
M : Type u_2
M' : Type u_3
inst✝⁴ : AddCommMonoid M
inst✝³ : AddCommMonoid M'
inst✝² : Module R M
inst✝¹ : Module R M'
f : M →ₗ[R] M'
inst✝ : IsLocalizedModule S f
m : M
s : ↥S
⊢ f m = ↑1 • mk' f m 1

Tactic:
OneMemClass.coe_one,

Goal state after:
R : Type u_1
inst✝⁵ : CommSemiring R
S : Submonoid R
M : Type u_2
M' : Type u_3
inst✝⁴ : AddCommMonoid M
inst✝³ : AddCommMonoid M'
inst✝² : Module R M
inst✝¹ : Module R M'
f : M →ₗ[R] M'
inst✝ : IsLocalizedModule S f
m : M
s : ↥S
⊢ f m = 1 • mk' f m 1
Module: Mathlib.CategoryTheory.Adjunction.Comma

Goal state before:
pp: C : Type u₁
D : Type u₂
inst✝¹ : Category.{v₁, u₁} C
inst✝ : Category.{v₂, u₂} D
G : D ⥤ C
F : C ⥤ D
h : F ⊣ G
A : D
s : Cone (Functor.empty (CostructuredArrow F A))
m : s.pt ⟶ (asEmptyCone (CostructuredArrow.mk (h.counit.app A))).pt
x✝ : ∀ (j : Discrete PEmpty.{1}), m ≫ (asEmptyCone (CostructuredArrow.mk (h.counit.app A))).π.app j = s.π.app j
⊢ m = CostructuredArrow.homMk ((h.homEquiv s.pt.left A) s.pt.hom) ⋯

Tactic:
apply CostructuredArrow.ext
    simp [← CostructuredArrow.w m]

Goal state after:
Module: Mathlib.Algebra.Module.LocalizedModule.Basic

Goal state before:
pp: R : Type u_1
inst✝¹⁰ : CommSemiring R
S : Submonoid R
M : Type u_2
M' : Type u_3
inst✝⁹ : AddCommMonoid M
inst✝⁸ : AddCommMonoid M'
inst✝⁷ : Module R M
inst✝⁶ : Module R M'
f : M →ₗ[R] M'
inst✝⁵ : IsLocalizedModule S f
N : Type u_6
N' : Type u_7
inst✝⁴ : AddCommMonoid N
inst✝³ : AddCommMonoid N'
inst✝² : Module R N
inst✝¹ : Module R N'
g : N →ₗ[R] N'
inst✝ : IsLocalizedModule S g
h : M →ₗ[R] N
x : M
s : ↥S
⊢ ((map S f g) h) (mk' f x s) = mk' g (h x) s

Tactic:
simp only [map, lift, LinearMap.coe_mk, AddHom.coe_mk, LinearMap.coe_comp, LinearEquiv.coe_coe,
    Function.comp_apply]

Goal state after:
R : Type u_1
inst✝¹⁰ : CommSemiring R
S : Submonoid R
M : Type u_2
M' : Type u_3
inst✝⁹ : AddCommMonoid M
inst✝⁸ : AddCommMonoid M'
inst✝⁷ : Module R M
inst✝⁶ : Module R M'
f : M →ₗ[R] M'
inst✝⁵ : IsLocalizedModule S f
N : Type u_6
N' : Type u_7
inst✝⁴ : AddCommMonoid N
inst✝³ : AddCommMonoid N'
inst✝² : Module R N
inst✝¹ : Module R N'
g : N →ₗ[R] N'
inst✝ : IsLocalizedModule S g
h : M →ₗ[R] N
x : M
s : ↥S
⊢ (LocalizedModule.lift S (g ∘ₗ h) ⋯) ((iso S f).symm (mk' f x s)) = mk' g (h x) s
Module: Mathlib.Algebra.Module.LocalizedModule.Basic

Goal state before:
pp: R : Type u_6
M : Type u_8
M' : Type u_9
inst✝⁵ : CommSemiring R
inst✝⁴ : AddCommMonoid M
inst✝³ : Module R M
inst✝² : AddCommMonoid M'
inst✝¹ : Module R M'
S : Submonoid R
g : M →ₗ[R] M'
inst✝ : IsLocalizedModule S g
⊢ (∀ ⦃x : M⦄, x ∈ ⊤ → x ∈ g.ker) ↔ ∀ (m : M), ∃ r ∈ S, r • m = 0

Tactic:
mem_ker_iff S,

Goal state after:
R : Type u_6
M : Type u_8
M' : Type u_9
inst✝⁵ : CommSemiring R
inst✝⁴ : AddCommMonoid M
inst✝³ : Module R M
inst✝² : AddCommMonoid M'
inst✝¹ : Module R M'
S : Submonoid R
g : M →ₗ[R] M'
inst✝ : IsLocalizedModule S g
⊢ (∀ ⦃x : M⦄, x ∈ ⊤ → ∃ r ∈ S, r • x = 0) ↔ ∀ (m : M), ∃ r ∈ S, r • m = 0
Module: Mathlib.RingTheory.Finiteness.Ideal

Goal state before:
pp: R : Type u_1
inst✝¹ : Semiring R
I : Ideal R
inst✝ : I.IsTwoSided
n : ℕ
hI : I.FG
⊢ FG 1

Tactic:
one_eq_top

Goal state after:
R : Type u_1
inst✝¹ : Semiring R
I : Ideal R
inst✝ : I.IsTwoSided
n : ℕ
hI : I.FG
⊢ ⊤.FG
Module: Mathlib.CategoryTheory.IsConnected

Goal state before:
pp: case tail
J : Type u₁
inst✝ : Category.{v₁, u₁} J
α : Type u₁
F : J → α
hF : ∀ {j₁ j₂ : J} (x : j₁ ⟶ j₂), F j₁ = F j₂
j j' b✝ c✝ : J
a✝ : Relation.ReflTransGen Zag j b✝
hj : Zag b✝ c✝
ih : F j = F b✝
⊢ F j = F c✝

Tactic:
| tail _ hj ih =>

Goal state after:
Module: Mathlib.CategoryTheory.ObjectProperty.Small

Goal state before:
pp: C : Type u_1
D : Type u_2
inst✝² : Category.{v_1, u_1} C
inst✝¹ : Category.{v_2, u_2} D
F : C ⥤ D
inst✝ : LocallySmall.{w, v_1, u_1} C
H₁ : ObjectProperty.EssentiallySmall.{w, v_2, u_2} F.essImage
H₂ : ∀ (Y : D), ObjectProperty.EssentiallySmall.{w, v_1, u_1} fun x ↦ Nonempty (F.obj x ≅ Y)
⊢ EssentiallySmall.{w, v_1, u_1} C

Tactic:
rw [essentiallySmall_iff_objectPropertyEssentiallySmall]
  exact ⟨‹_›, .of_functor _ F (.of_le (Q := F.essImage)
    fun Y ↦ by simp [ObjectProperty.map, Functor.essImage]) (by simpa)⟩

Goal state after:
Module: Mathlib.CategoryTheory.Elements

Goal state before:
pp: C : Type u
inst✝ : Category.{v, u} C
F : Cᵒᵖ ⥤ Type u_1
X : C
h : F.RepresentableBy X
Y : F.Elements
m : initialOfRepresentableBy h ⟶ Y
⊢ m = ⟨(h.homEquiv.symm Y.snd).op, ⋯⟩

Tactic:
simp [← m.2, ← h.homEquiv_unop_comp]

Goal state after:
Module: Mathlib.CategoryTheory.Grothendieck

Goal state before:
pp: C : Type u
inst✝¹ : Category.{v, u} C
D : Type u₁
inst✝ : Category.{v₁, u₁} D
F : C ⥤ Cat
G : C ⥤ Type w
X : Grothendieck (G ⋙ typeToCat)
⊢ (𝟭 (Grothendieck (G ⋙ typeToCat))).obj X ≅ (grothendieckTypeToCatFunctor G ⋙ grothendieckTypeToCatInverse G).obj X

Tactic:
rcases X with ⟨_, ⟨⟩⟩

Goal state after:
C : Type u
inst✝¹ : Category.{v, u} C
D : Type u₁
inst✝ : Category.{v₁, u₁} D
F : C ⥤ Cat
G : C ⥤ Type w
base✝ : C
as✝ : G.obj base✝
⊢ (𝟭 (Grothendieck (G ⋙ typeToCat))).obj { base := base✝, fiber := { as := as✝ } } ≅
    (grothendieckTypeToCatFunctor G ⋙ grothendieckTypeToCatInverse G).obj { base := base✝, fiber := { as := as✝ } }
Module: Mathlib.CategoryTheory.Limits.Final

Goal state before:
pp: C : Type u₁
inst✝³ : Category.{v₁, u₁} C
D : Type u₂
inst✝² : Category.{v₂, u₂} D
F : C ⥤ D
inst✝¹ : F.Final
E : Type u₃
inst✝ : Category.{v₃, u₃} E
G : D ⥤ E
d : D
Z : (X : C) → (d ⟶ F.obj X) → Sort u_1
h₁ : (X₁ X₂ : C) → (k₁ : d ⟶ F.obj X₁) → (k₂ : d ⟶ F.obj X₂) → (f : X₁ ⟶ X₂) → k₁ ≫ F.map f = k₂ → Z X₁ k₁ → Z X₂ k₂
h₂ : (X₁ X₂ : C) → (k₁ : d ⟶ F.obj X₁) → (k₂ : d ⟶ F.obj X₂) → (f : X₁ ⟶ X₂) → k₁ ≫ F.map f = k₂ → Z X₂ k₂ → Z X₁ k₁
X₀ : C
k₀ : d ⟶ F.obj X₀
z : Z X₀ k₀
⊢ Z (lift F d) (homToLift F d)

Tactic:
by
  apply Nonempty.some
  refine isPreconnected_induction (Z := fun Y : StructuredArrow d F => Z Y.right Y.hom)
    ?_ ?_ (j₀ := StructuredArrow.mk k₀) z _
  · exact fun f a ↦ h₁ _ _ _ _ f.right f.w a
  · exact fun f a ↦ h₂ _ _ _ _ f.right f.w a

Goal state after:
Module: Mathlib.CategoryTheory.Limits.Final

Goal state before:
pp: 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
F : C ⥤ D
G : D ⥤ E
hF : F.Final
hG : G.Final
s₁ : C ≌ AsSmall C := AsSmall.equiv
s₂ : D ≌ AsSmall D := AsSmall.equiv
s₃ : E ≌ AsSmall E := AsSmall.equiv
i : s₁.inverse ⋙ (F ⋙ G) ⋙ s₃.functor ≅ (s₁.inverse ⋙ F ⋙ s₂.functor) ⋙ s₂.inverse ⋙ G ⋙ s₃.functor :=
  (s₁.inverse ⋙ F).isoWhiskerLeft (isoWhiskerRight s₂.unitIso (G ⋙ s₃.functor))
⊢ ∀ (G_1 : AsSmall E ⥤ Type (max (max (max (max (max u₁ u₂) u₃) v₁) v₂) v₃)),
    IsIso (colimit.pre G_1 ((s₁.inverse ⋙ F ⋙ s₂.functor) ⋙ s₂.inverse ⋙ G ⋙ s₃.functor))

Tactic:
final_iff_comp_equivalence F s₂.functor,

Goal state after:
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
F : C ⥤ D
G : D ⥤ E
hG : G.Final
s₁ : C ≌ AsSmall C := AsSmall.equiv
s₂ : D ≌ AsSmall D := AsSmall.equiv
hF : (F ⋙ s₂.functor).Final
s₃ : E ≌ AsSmall E := AsSmall.equiv
i : s₁.inverse ⋙ (F ⋙ G) ⋙ s₃.functor ≅ (s₁.inverse ⋙ F ⋙ s₂.functor) ⋙ s₂.inverse ⋙ G ⋙ s₃.functor :=
  (s₁.inverse ⋙ F).isoWhiskerLeft (isoWhiskerRight s₂.unitIso (G ⋙ s₃.functor))
⊢ ∀ (G_1 : AsSmall E ⥤ Type (max (max (max (max (max u₁ u₂) u₃) v₁) v₂) v₃)),
    IsIso (colimit.pre G_1 ((s₁.inverse ⋙ F ⋙ s₂.functor) ⋙ s₂.inverse ⋙ G ⋙ s₃.functor))
Module: Mathlib.CategoryTheory.Limits.Final

Goal state before:
pp: 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
F : C ⥤ D
G : D ⥤ E
hF : F.Final
hFG : (F ⋙ G).Final
s₁ : C ≌ AsSmall C := AsSmall.equiv
s₂ : D ≌ AsSmall D := AsSmall.equiv
s₃ : E ≌ AsSmall E := AsSmall.equiv
_i : s₁.inverse ⋙ (F ⋙ G) ⋙ s₃.functor ≅ (s₁.inverse ⋙ F ⋙ s₂.functor) ⋙ s₂.inverse ⋙ G ⋙ s₃.functor :=
  (s₁.inverse ⋙ F).isoWhiskerLeft (isoWhiskerRight s₂.unitIso (G ⋙ s₃.functor))
⊢ ∀ (G_1 : AsSmall E ⥤ Type (max (max (max (max (max u₁ u₂) u₃) v₁) v₂) v₃)),
    IsIso (colimit.pre G_1 (s₂.inverse ⋙ G ⋙ s₃.functor))

Tactic:
final_iff_comp_equivalence F s₂.functor,

Goal state after:
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
F : C ⥤ D
G : D ⥤ E
hFG : (F ⋙ G).Final
s₁ : C ≌ AsSmall C := AsSmall.equiv
s₂ : D ≌ AsSmall D := AsSmall.equiv
hF : (F ⋙ s₂.functor).Final
s₃ : E ≌ AsSmall E := AsSmall.equiv
_i : s₁.inverse ⋙ (F ⋙ G) ⋙ s₃.functor ≅ (s₁.inverse ⋙ F ⋙ s₂.functor) ⋙ s₂.inverse ⋙ G ⋙ s₃.functor :=
  (s₁.inverse ⋙ F).isoWhiskerLeft (isoWhiskerRight s₂.unitIso (G ⋙ s₃.functor))
⊢ ∀ (G_1 : AsSmall E ⥤ Type (max (max (max (max (max u₁ u₂) u₃) v₁) v₂) v₃)),
    IsIso (colimit.pre G_1 (s₂.inverse ⋙ G ⋙ s₃.functor))
Module: Mathlib.CategoryTheory.Limits.Shapes.RegularMono

Goal state before:
pp: C : Type u₁
inst✝¹ : Category.{v₁, u₁} C
X✝ Y B X : C
f : X ⟶ B
inst✝ : EffectiveEpi f
c : PullbackCone f f
hc : IsLimit c
s : Cocone (parallelPair c.fst c.snd)
Z✝ : C
g₁ g₂ : Z✝ ⟶ X
hg : g₁ ≫ f = g₂ ≫ f
⊢ g₁ ≫ Cofork.π s = g₂ ≫ Cofork.π s

Tactic:
rw [← PullbackCone.IsLimit.lift_snd hc g₁ g₂ hg, Category.assoc,
        ← Cofork.app_zero_eq_comp_π_right]

Goal state after:
C : Type u₁
inst✝¹ : Category.{v₁, u₁} C
X✝ Y B X : C
f : X ⟶ B
inst✝ : EffectiveEpi f
c : PullbackCone f f
hc : IsLimit c
s : Cocone (parallelPair c.fst c.snd)
Z✝ : C
g₁ g₂ : Z✝ ⟶ X
hg : g₁ ≫ f = g₂ ≫ f
⊢ g₁ ≫ Cofork.π s = PullbackCone.IsLimit.lift hc g₁ g₂ hg ≫ s.ι.app WalkingParallelPair.zero
Module: Mathlib.CategoryTheory.Limits.Shapes.KernelPair

Goal state before:
pp: C : Type u
inst✝ : Category.{v, u} C
R X Y Z : C
f : X ⟶ Y
a b : R ⟶ X
k : IsKernelPair f a b
r : RegularEpi f
t : (PullbackCone.mk r.left r.right ⋯).pt ⟶ (IsPullback.cone k).pt :=
  (IsPullback.isLimit k).lift (PullbackCone.mk r.left r.right ⋯)
ht : t ≫ a = r.left
kt : t ≫ b = r.right
s : Cofork a b
⊢ r.left ≫ s.π = r.right ≫ s.π

Tactic:
← ht,

Goal state after:
C : Type u
inst✝ : Category.{v, u} C
R X Y Z : C
f : X ⟶ Y
a b : R ⟶ X
k : IsKernelPair f a b
r : RegularEpi f
t : (PullbackCone.mk r.left r.right ⋯).pt ⟶ (IsPullback.cone k).pt :=
  (IsPullback.isLimit k).lift (PullbackCone.mk r.left r.right ⋯)
ht : t ≫ a = r.left
kt : t ≫ b = r.right
s : Cofork a b
⊢ (t ≫ a) ≫ s.π = r.right ≫ s.π
Module: Mathlib.CategoryTheory.Limits.Final

Goal state before:
pp: case pos
C : Type u₁
inst✝ : Category.{v₁, u₁} C
P : ObjectProperty C
h : ∀ (d : C), ¬P d → IsConnected (CostructuredArrow P.ι d)
d : C
hd : P d
⊢ IsConnected (CostructuredArrow P.ι d)

Tactic:
have : Nonempty (CostructuredArrow P.ι d) := ⟨⟨d, hd⟩, ⟨⟨⟩⟩, 𝟙 _⟩
    refine zigzag_isConnected (fun j₁ j₂ ↦ Zigzag.trans
      (j₂ := by exact CostructuredArrow.mk (Y := ⟨d, hd⟩) (𝟙 _)) (.of_hom ?_) (.of_inv ?_))
    · exact CostructuredArrow.homMk (InducedCategory.homMk j₁.hom)
    · exact CostructuredArrow.homMk (InducedCategory.homMk j₂.hom)

Goal state after:
Module: Mathlib.CategoryTheory.Limits.Shapes.Diagonal

Goal state before:
pp: C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
X Y Z : C
inst✝ : HasPullbacks C
U V₁ V₂ : C
f : X ⟶ Y
i : U ⟶ Y
i₁ : V₁ ⟶ pullback f i
i₂ : V₂ ⟶ pullback f i
⊢ (i₁ ≫ snd f i) ≫ i = (i₁ ≫ fst f i) ≫ f

Tactic:
by simp [condition]

Goal state after:
Module: Mathlib.CategoryTheory.Limits.Shapes.Diagonal

Goal state before:
pp: C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
X Y Z : C
inst✝ : HasPullbacks C
U V₁ V₂ : C
f : X ⟶ Y
i : U ⟶ Y
i₁ : V₁ ⟶ pullback f i
i₂ : V₂ ⟶ pullback f i
⊢ (i₂ ≫ snd f i) ≫ i = (i₂ ≫ fst f i) ≫ f

Tactic:
by simp [condition]

Goal state after:
Module: Mathlib.CategoryTheory.Limits.Shapes.Diagonal

Goal state before:
pp: C : Type u_1
inst✝² : Category.{v_1, u_1} C
X Y Z : C
inst✝¹ : HasPullbacks C
U V₁ V₂ : C
f : X ⟶ Y
i : U ⟶ Y
i₁ : V₁ ⟶ pullback f i
i₂ : V₂ ⟶ pullback f i
inst✝ : HasPullback i₁ i₂
⊢ (i₁ ≫ snd f i) ≫ i = (i₁ ≫ fst f i) ≫ f

Tactic:
by simp [condition]

Goal state after:
Module: Mathlib.CategoryTheory.Limits.Shapes.Diagonal

Goal state before:
pp: C : Type u_1
inst✝² : Category.{v_1, u_1} C
X Y Z : C
inst✝¹ : HasPullbacks C
U V₁ V₂ : C
f : X ⟶ Y
i : U ⟶ Y
i₁ : V₁ ⟶ pullback f i
i₂ : V₂ ⟶ pullback f i
inst✝ : HasPullback i₁ i₂
⊢ (i₂ ≫ snd f i) ≫ i = (i₂ ≫ fst f i) ≫ f

Tactic:
by simp [condition]

Goal state after:
Module: Mathlib.RingTheory.RingHomProperties

Goal state before:
pp: P : {R S : Type u} → [inst : CommRing R] → [inst_1 : CommRing S] → (R →+* S) → Prop
⊢ (toMorphismProperty fun {R S} [CommRing R] [CommRing S] ↦ P).IsStableUnderCobaseChange ↔
    IsStableUnderBaseChange fun {R S} [CommRing R] [CommRing S] ↦ P

Tactic:
by
  refine ⟨fun h R S R' S' _ _ _ _ _ _ _ _ _ _ _ hsq hRS ↦ ?_,
      fun h ↦ ⟨fun {R} S R' S' f g f' g' hsq hf ↦ ?_⟩⟩
  · rw [← CommRingCat.isPushout_iff_isPushout] at hsq
    exact h.1 (f := CommRingCat.ofHom (algebraMap R S)) hsq.flip hRS
  · algebraize [f.hom, g.hom, f'.hom, g'.hom, f'.hom.comp g.hom]
    have : IsScalarTower R S S' := .of_algebraMap_eq fun x ↦ congr($(hsq.1.1).hom x)
    have : Algebra.IsPushout R S R' S' := (CommRingCat.isPushout_iff_isPushout.mp hsq).symm
    exact h (R := R) (S := S) _ _ hf

Goal state after:
Module: Mathlib.CategoryTheory.MorphismProperty.Limits

Goal state before:
pp: C : Type u
inst✝¹ : Category.{v, u} C
W₁ W₂ : MorphismProperty C
h : W₁ ≤ W₂
J : Type u_2
inst✝ : Category.{v_2, u_2} J
⊢ W₁.colimitsOfShape J ≤ W₂.colimitsOfShape J

Tactic:
by
  rintro _ _ _ ⟨_, _, _, _, _, h₂, f, hf⟩
  exact ⟨_, _, _, _, _, h₂, f, fun j ↦ h _ (hf j)⟩

Goal state after:
Module: Mathlib.CategoryTheory.ObjectProperty.LimitsOfShape

Goal state before:
pp: C : Type u_1
inst✝² : Category.{v_1, u_1} C
P : ObjectProperty C
J : Type u'
inst✝¹ : Category.{v', u'} J
inst✝ : P.IsClosedUnderIsomorphisms
h : P.strictLimitsOfShape J ≤ P
⊢ P.limitsOfShape J ≤ P

Tactic:
conv_rhs => rw [← P.isoClosure_eq_self]

Goal state after:
C : Type u_1
inst✝² : Category.{v_1, u_1} C
P : ObjectProperty C
J : Type u'
inst✝¹ : Category.{v', u'} J
inst✝ : P.IsClosedUnderIsomorphisms
h : P.strictLimitsOfShape J ≤ P
⊢ P.limitsOfShape J ≤ P.isoClosure
Module: Mathlib.CategoryTheory.ObjectProperty.Retract

Goal state before:
pp: C : Type u
inst✝¹ : Category.{v, u} C
P : ObjectProperty C
inst✝ : P.IsStableUnderRetracts
⊢ P.retractClosure = P

Tactic:
apply le_antisymm

Goal state after:
case a
C : Type u
inst✝¹ : Category.{v, u} C
P : ObjectProperty C
inst✝ : P.IsStableUnderRetracts
⊢ P.retractClosure ≤ P

case a
C : Type u
inst✝¹ : Category.{v, u} C
P : ObjectProperty C
inst✝ : P.IsStableUnderRetracts
⊢ P ≤ P.retractClosure
Module: Mathlib.CategoryTheory.Limits.Shapes.Diagonal

Goal state before:
pp: C : Type u_1
inst✝² : Category.{v_1, u_1} C
X✝ Y✝ Z X Y : C
f : X ⟶ Y
inst✝¹ : HasPushout f f
inst✝ : Epi f
⊢ IsIso (codiagonal f)

Tactic:
by
  rw [(IsIso.inv_eq_of_hom_inv_id (inl_codiagonal f)).symm]
  infer_instance

Goal state after:
Module: Mathlib.CategoryTheory.ObjectProperty.ColimitsOfShape

Goal state before:
pp: C : Type u_1
inst✝² : Category.{v_1, u_1} C
P : ObjectProperty C
J : Type u'
inst✝¹ : Category.{v', u'} J
inst✝ : P.IsClosedUnderIsomorphisms
h : P.strictColimitsOfShape J ≤ P
⊢ P.colimitsOfShape J ≤ P

Tactic:
conv_rhs => rw [← P.isoClosure_eq_self]

Goal state after:
C : Type u_1
inst✝² : Category.{v_1, u_1} C
P : ObjectProperty C
J : Type u'
inst✝¹ : Category.{v', u'} J
inst✝ : P.IsClosedUnderIsomorphisms
h : P.strictColimitsOfShape J ≤ P
⊢ P.colimitsOfShape J ≤ P.isoClosure
Module: Mathlib.CategoryTheory.ObjectProperty.ColimitsOfShape

Goal state before:
pp: C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
P : ObjectProperty C
J : Type u'
inst✝ : Category.{v', u'} J
⊢ P.IsClosedUnderLimitsOfShape J ↔ P.op.IsClosedUnderColimitsOfShape Jᵒᵖ

Tactic:
by
  rw [isClosedUnderColimitsOfShape_iff, isClosedUnderLimitsOfShape_iff,
    limitsOfShape_eq_unop_colimitsOfShape, ← op_monotone_iff, op_unop]

Goal state after:
Module: Mathlib.CategoryTheory.Monoidal.Cartesian.Mon

Goal state before:
pp: C : Type u_1
D : Type u_2
inst✝⁶ : Category.{v, u_1} C
inst✝⁵ : CartesianMonoidalCategory C
inst✝⁴ : Category.{w, u_2} D
inst✝³ : CartesianMonoidalCategory D
M✝ N✝ O X Y : C
inst✝² : MonObj M✝
inst✝¹ : MonObj N✝
inst✝ : MonObj O
M N : Mon C
α : yonedaMon.obj M ⟶ yonedaMon.obj N
⊢ η ≫ (ConcreteCategory.hom (α.app (op M.X))) (𝟙 M.X) = η

Tactic:
dsimp only [yonedaMon_obj] at α ⊢
          rw [← yonedaMon_naturality, Category.comp_id,
            ← Category.id_comp η[M.X], toUnit_unique (𝟙 _) (toUnit _),
            ← Category.id_comp η[N.X], toUnit_unique (𝟙 _) (toUnit _)]
          exact (α.app _).hom.map_one

Goal state after:
Module: Mathlib.CategoryTheory.Monoidal.Cartesian.Basic

Goal state before:
pp: C : Type u₁
inst✝⁸ : Category.{v₁, u₁} C
inst✝⁷ : CartesianMonoidalCategory C
D : Type u₂
inst✝⁶ : Category.{v₂, u₂} D
inst✝⁵ : CartesianMonoidalCategory D
E : Type u₃
inst✝⁴ : Category.{v₃, u₃} E
inst✝³ : CartesianMonoidalCategory E
F : C ⥤ D
G : D ⥤ E
inst✝² : F.Monoidal
inst✝¹ : G.Monoidal
inst✝ : (F ⋙ G).Monoidal
X Y : C
⊢ μ (F ⋙ G) X Y = μ G (F.obj X) (F.obj Y) ≫ G.map (μ F X Y)

Tactic:
rw [← cancel_mono (μIso _ _ _).inv]

Goal state after:
C : Type u₁
inst✝⁸ : Category.{v₁, u₁} C
inst✝⁷ : CartesianMonoidalCategory C
D : Type u₂
inst✝⁶ : Category.{v₂, u₂} D
inst✝⁵ : CartesianMonoidalCategory D
E : Type u₃
inst✝⁴ : Category.{v₃, u₃} E
inst✝³ : CartesianMonoidalCategory E
F : C ⥤ D
G : D ⥤ E
inst✝² : F.Monoidal
inst✝¹ : G.Monoidal
inst✝ : (F ⋙ G).Monoidal
X Y : C
⊢ μ (F ⋙ G) X Y ≫ (μIso (F ⋙ G) X Y).inv = (μ G (F.obj X) (F.obj Y) ≫ G.map (μ F X Y)) ≫ (μIso (F ⋙ G) X Y).inv
Module: Mathlib.RingTheory.HopfAlgebra.Convolution

Goal state before:
pp: R : Type u_1
C : Type u_3
inst✝² : CommSemiring R
inst✝¹ : Semiring C
inst✝ : HopfAlgebra R C
⊢ δ ∘ₗ Algebra.linearMap R C = Algebra.linearMap R (C ⊗[R] C)

Tactic:
ext; simp; rfl

Goal state after: