mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.LinearAlgebra.PerfectPairing.Restrict

Goal state before:
pp: K : Type u_1
L : Type u_2
M : Type u_3
N : Type u_4
inst✝¹⁰ : Field K
inst✝⁹ : Field L
inst✝⁸ : Algebra K L
inst✝⁷ : AddCommGroup M
inst✝⁶ : AddCommGroup N
inst✝⁵ : Module L M
inst✝⁴ : Module L N
inst✝³ : Module K M
inst✝² : Module K N
inst✝¹ : IsScalarTower K L M
p : M →ₗ[L] N →ₗ[L] L
inst✝ : p.IsPerfPair
M' : Submodule K M
N' : Submodule K N
hM : span L ↑M' = ⊤
hN : span L ↑N' = ⊤
hp : ∀ x ∈ M', ∀ y ∈ N', (p x) y ∈ (algebraMap K L).range
this✝² : IsReflexive L M
this✝¹ : IsReflexive L N
v : Set M
hv₁ : v ⊆ ↑M'
hv₂ : span L v = ⊤
hv₃ : LinearIndependent L Subtype.val
b : Basis { x // x ∈ v } L M := Basis.mk hv₃ ⋯
this✝ : Fintype ↑v
v' : ↑v → ↥M' := fun i ↦ ⟨↑i, ⋯⟩
hv' : LinearIndependent (ι := ↑v) K v'
this : span K v = M'
⊢ span K (⇑M'.subtype '' Set.range v') = Submodule.map M'.subtype ⊤

Tactic:
← Set.image_univ,

Goal state after:
K : Type u_1
L : Type u_2
M : Type u_3
N : Type u_4
inst✝¹⁰ : Field K
inst✝⁹ : Field L
inst✝⁸ : Algebra K L
inst✝⁷ : AddCommGroup M
inst✝⁶ : AddCommGroup N
inst✝⁵ : Module L M
inst✝⁴ : Module L N
inst✝³ : Module K M
inst✝² : Module K N
inst✝¹ : IsScalarTower K L M
p : M →ₗ[L] N →ₗ[L] L
inst✝ : p.IsPerfPair
M' : Submodule K M
N' : Submodule K N
hM : span L ↑M' = ⊤
hN : span L ↑N' = ⊤
hp : ∀ x ∈ M', ∀ y ∈ N', (p x) y ∈ (algebraMap K L).range
this✝² : IsReflexive L M
this✝¹ : IsReflexive L N
v : Set M
hv₁ : v ⊆ ↑M'
hv₂ : span L v = ⊤
hv₃ : LinearIndependent L Subtype.val
b : Basis { x // x ∈ v } L M := Basis.mk hv₃ ⋯
this✝ : Fintype ↑v
v' : ↑v → ↥M' := fun i ↦ ⟨↑i, ⋯⟩
hv' : LinearIndependent (ι := ↑v) K v'
this : span K v = M'
⊢ span K (⇑M'.subtype '' v' '' univ) = Submodule.map M'.subtype ⊤
Module: Mathlib.RingTheory.Ideal.Quotient.PowTransition

Goal state before:
pp: R : Type u_1
inst✝² : Ring R
M : Type u_2
inst✝¹ : AddCommGroup M
inst✝ : Module R M
p : ℕ → Submodule R M
hp : Antitone p
x : (n : ℕ) → M ⧸ p n
h : ∀ (m : ℕ), x m = (factor ⋯) (x (m + 1))
k : ℕ
ih : ∀ {m n : ℕ} (g : m ≤ n), n = m + (n - m) → n - m = k → x m = (factor ⋯) (x n)
m : ℕ
g : m ≤ m + k + 1
hmn : m + k + 1 - m = k + 1
⊢ m + k = m + (m + k - m)

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Ideal.Quotient.PowTransition

Goal state before:
pp: case succ
R : Type u_1
inst✝² : Ring R
M : Type u_2
inst✝¹ : AddCommGroup M
inst✝ : Module R M
p : ℕ → Submodule R M
hp : Antitone p
x : (n : ℕ) → M ⧸ p n
h : ∀ (m : ℕ), x m = (factor ⋯) (x (m + 1))
k : ℕ
ih : ∀ {m n : ℕ} (g : m ≤ n), n = m + (n - m) → n - m = k → x m = (factor ⋯) (x n)
m n : ℕ
g : m ≤ n
this : n = m + (n - m)
hmn : n - m = k + 1
⊢ x m = (factor ⋯) (x n)

Tactic:
| succ k ih =>

Goal state after:
Module: Mathlib.LinearAlgebra.PerfectPairing.Restrict

Goal state before:
pp: K : Type u_1
L : Type u_2
M : Type u_3
N : Type u_4
inst✝¹⁵ : Field K
inst✝¹⁴ : Field L
inst✝¹³ : Algebra K L
inst✝¹² : AddCommGroup M
inst✝¹¹ : AddCommGroup N
inst✝¹⁰ : Module L M
inst✝⁹ : Module L N
inst✝⁸ : Module K M
inst✝⁷ : Module K N
inst✝⁶ : IsScalarTower K L M
p : M →ₗ[L] N →ₗ[L] L
inst✝⁵ : p.IsPerfPair
M' : Type u_5
N' : Type u_6
inst✝⁴ : AddCommGroup M'
inst✝³ : AddCommGroup N'
inst✝² : Module K M'
inst✝¹ : Module K N'
inst✝ : IsScalarTower K L N
i : M' →ₗ[K] M
j : N' →ₗ[K] N
hi : Injective ⇑i
hj : Injective ⇑j
hij : p.IsPerfectCompl (span L ↑i.range) (span L ↑j.range)
hp : ∀ (m : M') (n : N'), (p (i m)) (j n) ∈ (algebraMap K L).range
⊢ Injective ⇑(span L (Set.range ⇑i)).subtype

Tactic:
by simp

Goal state after:
Module: Mathlib.LinearAlgebra.PerfectPairing.Restrict

Goal state before:
pp: K : Type u_1
L : Type u_2
M : Type u_3
N : Type u_4
inst✝¹⁵ : Field K
inst✝¹⁴ : Field L
inst✝¹³ : Algebra K L
inst✝¹² : AddCommGroup M
inst✝¹¹ : AddCommGroup N
inst✝¹⁰ : Module L M
inst✝⁹ : Module L N
inst✝⁸ : Module K M
inst✝⁷ : Module K N
inst✝⁶ : IsScalarTower K L M
p : M →ₗ[L] N →ₗ[L] L
inst✝⁵ : p.IsPerfPair
M' : Type u_5
N' : Type u_6
inst✝⁴ : AddCommGroup M'
inst✝³ : AddCommGroup N'
inst✝² : Module K M'
inst✝¹ : Module K N'
inst✝ : IsScalarTower K L N
i : M' →ₗ[K] M
j : N' →ₗ[K] N
hi : Injective ⇑i
hj : Injective ⇑j
hij : p.IsPerfectCompl (span L ↑i.range) (span L ↑j.range)
hp : ∀ (m : M') (n : N'), (p (i m)) (j n) ∈ (algebraMap K L).range
⊢ Injective ⇑(span L (Set.range ⇑j)).subtype

Tactic:
by simp

Goal state after:
Module: Mathlib.LinearAlgebra.PerfectPairing.Restrict

Goal state before:
pp: K : Type u_1
L : Type u_2
M : Type u_3
N : Type u_4
inst✝¹⁵ : Field K
inst✝¹⁴ : Field L
inst✝¹³ : Algebra K L
inst✝¹² : AddCommGroup M
inst✝¹¹ : AddCommGroup N
inst✝¹⁰ : Module L M
inst✝⁹ : Module L N
inst✝⁸ : Module K M
inst✝⁷ : Module K N
inst✝⁶ : IsScalarTower K L M
p : M →ₗ[L] N →ₗ[L] L
inst✝⁵ : p.IsPerfPair
M' : Type u_5
N' : Type u_6
inst✝⁴ : AddCommGroup M'
inst✝³ : AddCommGroup N'
inst✝² : Module K M'
inst✝¹ : Module K N'
inst✝ : IsScalarTower K L N
i : M' →ₗ[K] M
j : N' →ₗ[K] N
hi : Injective ⇑i
hj : Injective ⇑j
hij : p.IsPerfectCompl (span L ↑i.range) (span L ↑j.range)
hp : ∀ (m : M') (n : N'), (p (i m)) (j n) ∈ (algebraMap K L).range
this : (p.compl₁₂ (span L (Set.range ⇑i)).subtype (span L (Set.range ⇑j)).subtype).IsPerfPair
x : M'
y : N'
⊢ i x ∈ ↑i.range

Tactic:
by simp

Goal state after:
Module: Mathlib.LinearAlgebra.PerfectPairing.Restrict

Goal state before:
pp: K : Type u_1
L : Type u_2
M : Type u_3
N : Type u_4
inst✝¹⁵ : Field K
inst✝¹⁴ : Field L
inst✝¹³ : Algebra K L
inst✝¹² : AddCommGroup M
inst✝¹¹ : AddCommGroup N
inst✝¹⁰ : Module L M
inst✝⁹ : Module L N
inst✝⁸ : Module K M
inst✝⁷ : Module K N
inst✝⁶ : IsScalarTower K L M
p : M →ₗ[L] N →ₗ[L] L
inst✝⁵ : p.IsPerfPair
M' : Type u_5
N' : Type u_6
inst✝⁴ : AddCommGroup M'
inst✝³ : AddCommGroup N'
inst✝² : Module K M'
inst✝¹ : Module K N'
inst✝ : IsScalarTower K L N
i : M' →ₗ[K] M
j : N' →ₗ[K] N
hi : Injective ⇑i
hj : Injective ⇑j
hij : p.IsPerfectCompl (span L ↑i.range) (span L ↑j.range)
hp : ∀ (m : M') (n : N'), (p (i m)) (j n) ∈ (algebraMap K L).range
this : (p.compl₁₂ (span L (Set.range ⇑i)).subtype (span L (Set.range ⇑j)).subtype).IsPerfPair
x : M'
y : N'
⊢ j y ∈ ↑j.range

Tactic:
by simp

Goal state after:
Module: Mathlib.Algebra.Order.GroupWithZero.WithZero

Goal state before:
pp: α : Type u_1
inst✝² : Mul α
inst✝¹ : Preorder α
inst✝ : MulLeftMono α
x✝¹ : 0 ≤ 0
a b : WithZero α
x✝ : a ≤ b
⊢ 0 * a ≤ 0 * b

Tactic:
by simp

Goal state after:
Module: Mathlib.Algebra.Order.GroupWithZero.WithZero

Goal state before:
pp: α : Type u_1
inst✝² : Mul α
inst✝¹ : Preorder α
inst✝ : MulLeftMono α
x : α
x✝² : 0 ≤ ↑x
x✝¹ : WithZero α
x✝ : 0 ≤ x✝¹
⊢ ↑x * 0 ≤ ↑x * x✝¹

Tactic:
by simp

Goal state after:
Module: Mathlib.Algebra.Order.GroupWithZero.WithZero

Goal state before:
pp: α : Type u_1
inst✝² : Mul α
inst✝¹ : Preorder α
inst✝ : MulRightMono α
x✝¹ : 0 ≤ 0
a b : WithZero α
x✝ : a ≤ b
⊢ a * 0 ≤ b * 0

Tactic:
by simp

Goal state after:
Module: Mathlib.Algebra.Order.GroupWithZero.WithZero

Goal state before:
pp: α : Type u_1
inst✝² : Mul α
inst✝¹ : Preorder α
inst✝ : MulRightMono α
x : α
x✝² : 0 ≤ ↑x
x✝¹ : WithZero α
x✝ : 0 ≤ x✝¹
⊢ 0 * ↑x ≤ x✝¹ * ↑x

Tactic:
by simp

Goal state after:
Module: Mathlib.Algebra.Order.GroupWithZero.Range

Goal state before:
pp: A : Type u_1
B : Type u_2
inst✝¹ : MonoidWithZero A
inst✝ : LinearOrderedCommGroupWithZero B
f : A →*₀ B
x✝ : f.ValueGroup₀
⊢ 0 ≤ x✝

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Length

Goal state before:
pp: R : Type u_1
M : Type u_2
inst✝⁶ : Ring R
inst✝⁵ : AddCommGroup M
inst✝⁴ : Module R M
S : Type u_3
inst✝³ : CommRing S
inst✝² : Algebra S R
inst✝¹ : Module S M
inst✝ : IsScalarTower S R M
h : Function.Surjective ⇑(algebraMap S R)
this : RingHomSurjective (algebraMap S R)
⊢ ∀ (m : S) (x : M), (AddHom.id M).toFun (m • x) = (algebraMap S R) m • (AddHom.id M).toFun x

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Length

Goal state before:
pp: case h_option
R : Type u_1
inst✝ : Ring R
⊢ ∀ (α : Type u_5) [inst : Fintype α],
    (∀ (M : α → Type u_6) [inst_1 : (i : α) → AddCommGroup (M i)] [inst_2 : (i : α) → Module R (M i)],
        length R ((i : α) → M i) = ∑ i, length R (M i)) →
      ∀ (M : Option α → Type u_6) [inst_1 : (i : Option α) → AddCommGroup (M i)]
        [inst_2 : (i : Option α) → Module R (M i)], length R ((i : Option α) → M i) = ∑ i, length R (M i)

Tactic:
intro ι _ IH M _ _
    rw [(LinearEquiv.piOptionEquivProd _).length_eq, Module.length_prod, IH, add_comm,
      Fintype.sum_option, add_comm]

Goal state after:
Module: Mathlib.RingTheory.Valuation.Integers

Goal state before:
pp: R : Type u
Γ₀ : Type v
inst✝¹ : Ring R
inst✝ : LinearOrderedCommGroupWithZero Γ₀
v : Valuation R Γ₀
⊢ 0 ∈ {x | v x ≤ 1}

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.Integers

Goal state before:
pp: R : Type u
Γ₀ : Type v
inst✝³ : CommRing R
inst✝² : LinearOrderedCommGroupWithZero Γ₀
v : Valuation R Γ₀
O : Type w
inst✝¹ : CommRing O
inst✝ : Algebra O R
hv : v.Integers O
h : Nontrivial R
⊢ v 0 ≤ 1

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.Integers

Goal state before:
pp: R : Type u
Γ₀ : Type v
inst✝³ : CommRing R
inst✝² : LinearOrderedCommGroupWithZero Γ₀
v : Valuation R Γ₀
O : Type w
inst✝¹ : CommRing O
inst✝ : Algebra O R
hv : v.Integers O
h : Nontrivial R
o0 : O
ho0 : (algebraMap O R) o0 = 0
⊢ v 1 ≤ 1

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.ValuationRing

Goal state before:
pp: case mk
A : Type u
inst✝⁵ : CommRing A
K : Type v
inst✝⁴ : Field K
inst✝³ : Algebra A K
inst✝² : IsDomain A
inst✝¹ : ValuationRing A
inst✝ : IsFractionRing A K
a✝ : ValueGroup A K
a : K
⊢ (MulAction.orbitRel Aˣ K) (1 * a) a

Tactic:
rw [one_mul]

Goal state after:
Module: Mathlib.RingTheory.Valuation.ValuationRing

Goal state before:
pp: A : Type u
inst✝⁵ : CommRing A
K : Type v
inst✝⁴ : Field K
inst✝³ : Algebra A K
inst✝² : IsDomain A
inst✝¹ : ValuationRing A
inst✝ : IsFractionRing A K
⊢ 0⁻¹ = 0

Tactic:
by apply Quotient.sound'; rw [inv_zero]

Goal state after:
Module: Mathlib.RingTheory.Valuation.Integers

Goal state before:
pp: F : Type u
Γ₀ : Type v
inst✝⁴ : Field F
inst✝³ : LinearOrderedCommGroupWithZero Γ₀
v : Valuation F Γ₀
O : Type w
inst✝² : CommRing O
inst✝¹ : Algebra O F
inst✝ : IsPrincipalIdealRing O
hv : v.Integers O
H : DenselyOrdered ↑(range ⇑v)
⊢ 0 ∈ ⇑v ∘ ⇑(algebraMap O F) ⁻¹' Iio 1

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.AdicCompletion.Basic

Goal state before:
pp: R : Type u_1
S : Type u_2
T : Type u_3
inst✝⁴ : CommRing R
I : Ideal R
M : Type u_4
inst✝³ : AddCommGroup M
inst✝² : Module R M
N : Type u_5
inst✝¹ : AddCommGroup N
inst✝ : Module R N
⊢ ∀ {m n : ℕ} (hmn : m ≤ n), (transitionMap I M hmn) (0 n) = 0 m

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.AdicCompletion.Basic

Goal state before:
pp: R : Type u_1
inst✝² : CommRing R
I : Ideal R
M : Type u_4
inst✝¹ : AddCommGroup M
inst✝ : Module R M
ι : Type u_6
s : Finset ι
f : ι → AdicCompletion I M
n : ℕ
⊢ ↑(∑ i ∈ s, f i) n = ∑ i ∈ s, ↑(f i) n

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.ValuationRing

Goal state before:
pp: R : Type u_1
inst✝⁵ : CommRing R
inst✝⁴ : IsDomain R
K : Type u_2
inst✝³ : Field K
inst✝² : Algebra R K
inst✝¹ : IsFractionRing R K
inst✝ : ValuationRing R
x y : R
⊢ Submodule.IsPrincipal (max (Ideal.span {x}) (Ideal.span {y}))

Tactic:
rcases le_total (Ideal.span {x} : Ideal R) (Ideal.span {y}) with h | h

Goal state after:
case inl
R : Type u_1
inst✝⁵ : CommRing R
inst✝⁴ : IsDomain R
K : Type u_2
inst✝³ : Field K
inst✝² : Algebra R K
inst✝¹ : IsFractionRing R K
inst✝ : ValuationRing R
x y : R
h : Ideal.span {x} ≤ Ideal.span {y}
⊢ Submodule.IsPrincipal (max (Ideal.span {x}) (Ideal.span {y}))

case inr
R : Type u_1
inst✝⁵ : CommRing R
inst✝⁴ : IsDomain R
K : Type u_2
inst✝³ : Field K
inst✝² : Algebra R K
inst✝¹ : IsFractionRing R K
inst✝ : ValuationRing R
x y : R
h : Ideal.span {y} ≤ Ideal.span {x}
⊢ Submodule.IsPrincipal (max (Ideal.span {x}) (Ideal.span {y}))
Module: Mathlib.RingTheory.Valuation.ValuationRing

Goal state before:
pp: R : Type u_1
inst✝⁶ : CommRing R
inst✝⁵ : IsDomain R
K : Type u_2
inst✝⁴ : Field K
inst✝³ : Algebra R K
inst✝² : IsFractionRing R K
inst✝¹ : IsLocalRing R
inst✝ : IsBezout R
a b g : R
e : Ideal.span {a, b} = Ideal.span {g}
⊢ a ∈ {a, b}

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.ValuationRing

Goal state before:
pp: R : Type u_1
inst✝⁶ : CommRing R
inst✝⁵ : IsDomain R
K : Type u_2
inst✝⁴ : Field K
inst✝³ : Algebra R K
inst✝² : IsFractionRing R K
inst✝¹ : IsLocalRing R
inst✝ : IsBezout R
b g a : R
e : Ideal.span {a * g, b} = Ideal.span {g}
⊢ b ∈ {a * g, b}

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.ValuationRing

Goal state before:
pp: R : Type u_1
inst✝⁶ : CommRing R
inst✝⁵ : IsDomain R
K : Type u_2
inst✝⁴ : Field K
inst✝³ : Algebra R K
inst✝² : IsFractionRing R K
inst✝¹ : IsLocalRing R
inst✝ : IsBezout R
g a b : R
e : Ideal.span {a * g, b * g} = Ideal.span {g}
⊢ g ∈ {g}

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.ValuationRing

Goal state before:
pp: 𝒪 : Type u
K : Type v
inst✝² : CommRing 𝒪
inst✝¹ : Field K
inst✝ : Algebra 𝒪 K
h : ∀ (x : K), ∃ a, x = (algebraMap 𝒪 K) a ∨ x⁻¹ = (algebraMap 𝒪 K) a
hinj : Function.Injective ⇑(algebraMap 𝒪 K)
this : IsDomain 𝒪
⊢ IsFractionRing 𝒪 K

Tactic:
have := (faithfulSMul_iff_algebraMap_injective ..).2 hinj

Goal state after:
𝒪 : Type u
K : Type v
inst✝² : CommRing 𝒪
inst✝¹ : Field K
inst✝ : Algebra 𝒪 K
h : ∀ (x : K), ∃ a, x = (algebraMap 𝒪 K) a ∨ x⁻¹ = (algebraMap 𝒪 K) a
hinj : Function.Injective ⇑(algebraMap 𝒪 K)
this✝ : IsDomain 𝒪
this : FaithfulSMul 𝒪 K
⊢ IsFractionRing 𝒪 K
Module: Mathlib.RingTheory.Valuation.ValuationRing

Goal state before:
pp: 𝒪 : Type u
K : Type v
inst✝² : CommRing 𝒪
inst✝¹ : Field K
inst✝ : Algebra 𝒪 K
h : ∀ (x : K), ∃ a, x = (algebraMap 𝒪 K) a ∨ x⁻¹ = (algebraMap 𝒪 K) a
hinj : Function.Injective ⇑(algebraMap 𝒪 K)
this✝¹ : IsDomain 𝒪
this✝ : FaithfulSMul 𝒪 K
this : IsDomain 𝒪
⊢ ∀ (y : ↥(nonZeroDivisors 𝒪)), IsUnit ((algebraMap 𝒪 K) ↑y)

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Jacobson.Polynomial

Goal state before:
pp: R : Type u_1
inst✝ : CommRing R
J : Ideal R[X]
j : Ideal R
hj : j ∈ {J | J.IsMaximal} ∧ map C j = J
this : j.IsMaximal
f : (R ⧸ j)[X]
hf : f ∈ ⊥.jacobson
⊢ X.coeff 1 ≠ coeff 0 1

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Jacobson.Ring

Goal state before:
pp: R : Type u_1
S : Type u_2
inst✝¹ : CommRing R
inst✝ : CommRing S
H : IsJacobsonRing R
⊢ (∃ f, Function.Surjective ⇑f) → IsJacobsonRing S

Tactic:
rintro ⟨f, hf⟩
  rw [isJacobsonRing_iff_sInf_maximal]
  intro p hp
  use map f '' { J : Ideal R | comap f p ≤ J ∧ J.IsMaximal }
  use fun j ⟨J, hJ, hmap⟩ => hmap ▸ (map_eq_top_or_isMaximal_of_surjective f hf hJ.right).symm
  have : p = map f (comap f p).jacobson :=
    (IsJacobsonRing.out' _ <| hp.isRadical.comap f).symm ▸ (map_comap_of_surjective f hf p).symm
  exact this.trans (map_sInf hf fun J ⟨hJ, _⟩ => le_trans (Ideal.ker_le_comap f) hJ)

Goal state after:
Module: Mathlib.RingTheory.Jacobson.Ring

Goal state before:
pp: case neg
R : Type u_1
S : Type u_2
inst✝⁴ : CommRing R
inst✝³ : CommRing S
inst✝² : Algebra R S
inst✝¹ : Algebra.IsIntegral R S
inst✝ : IsJacobsonRing R
P : Ideal S
hP : P.IsPrime
hP_top : ¬comap (algebraMap R S) P = ⊤
this : Nontrivial (R ⧸ comap (algebraMap R S) P)
⊢ ⊥.jacobson = ⊥

Tactic:
refine eq_bot_of_comap_eq_bot (R := R ⧸ comap (algebraMap R S) P) ?_

Goal state after:
case neg
R : Type u_1
S : Type u_2
inst✝⁴ : CommRing R
inst✝³ : CommRing S
inst✝² : Algebra R S
inst✝¹ : Algebra.IsIntegral R S
inst✝ : IsJacobsonRing R
P : Ideal S
hP : P.IsPrime
hP_top : ¬comap (algebraMap R S) P = ⊤
this : Nontrivial (R ⧸ comap (algebraMap R S) P)
⊢ comap (algebraMap (R ⧸ comap (algebraMap R S) P) (S ⧸ P)) ⊥.jacobson = ⊥
Module: Mathlib.RingTheory.Jacobson.Ring

Goal state before:
pp: case mp
R : Type u_1
S : Type u_2
inst✝³ : CommRing R
inst✝² : CommRing S
y : R
inst✝¹ : Algebra R S
inst✝ : Away y S
H : IsJacobsonRing R
J : Ideal S
h : J.IsMaximal
hJ : (under R J).IsPrime ∧ Disjoint ↑(powers y) ↑(under R J)
this : ∃ I ∈ {J_1 | under R J ≤ J_1 ∧ J_1.IsMaximal}, y ∉ I
⊢ (under R J).IsMaximal

Tactic:
rcases this with ⟨I, ⟨hJI, hIm⟩, hI'⟩

Goal state after:
case mp
R : Type u_1
S : Type u_2
inst✝³ : CommRing R
inst✝² : CommRing S
y : R
inst✝¹ : Algebra R S
inst✝ : Away y S
H : IsJacobsonRing R
J : Ideal S
h : J.IsMaximal
hJ : (under R J).IsPrime ∧ Disjoint ↑(powers y) ↑(under R J)
I : Ideal R
hI' : y ∉ I
hJI : under R J ≤ I
hIm : I.IsMaximal
⊢ (under R J).IsMaximal
Module: Mathlib.RingTheory.Valuation.Basic

Goal state before:
pp: K : Type u_1
F : Type u_2
R : Type u_3
inst✝⁵ : DivisionRing K
Γ₀ : Type u_4
Γ'₀ : Type u_5
Γ''₀ : Type u_6
inst✝⁴ : Ring R
inst✝³ : LinearOrderedCommMonoidWithZero Γ₀
inst✝² : LinearOrderedCommMonoidWithZero Γ'₀
inst✝¹ : LinearOrderedCommMonoidWithZero Γ''₀
v✝ : Valuation R Γ₀
S : Type u_7
inst✝ : Ring S
f : S →+* R
v : Valuation R Γ₀
x y : S
⊢ (⇑v ∘ ⇑f) (x + y) ≤ max ((⇑v ∘ ⇑f) x) ((⇑v ∘ ⇑f) y)

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.DiscreteValuationRing.Basic

Goal state before:
pp: R : Type u_1
inst✝² : CommRing R
inst✝¹ : IsDomain R
inst✝ : IsDiscreteValuationRing R
s : Ideal R
hs : s ≠ ⊥
ϖ : R
hirr : Irreducible ϖ
⊢ ¬generator s = 0

Tactic:
← eq_bot_iff_generator_eq_zero

Goal state after:
R : Type u_1
inst✝² : CommRing R
inst✝¹ : IsDomain R
inst✝ : IsDiscreteValuationRing R
s : Ideal R
hs : s ≠ ⊥
ϖ : R
hirr : Irreducible ϖ
⊢ ¬s = ⊥
Module: Mathlib.RingTheory.Valuation.Basic

Goal state before:
pp: R : Type u_3
Γ₀ : Type u_4
inst✝¹ : Ring R
inst✝ : LinearOrderedCommMonoidWithZero Γ₀
v : Valuation R Γ₀
x✝ y✝ x y : R
h : v x ≠ v y
h' : v (x + y) < v x
vyx : v y < v x
⊢ v x = v (x + y - y)

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.AdicCompletion.Basic

Goal state before:
pp: case h.succ
R : Type u_1
inst✝¹ : CommRing R
I : Ideal R
inst✝ : IsAdicComplete I R
x : R
hx : x ∈ I
y : R
f : ℕ → R := fun n ↦ ∑ i ∈ range n, (x * y) ^ i
hf : ∀ (m n : ℕ), m ≤ n → f m ≡ f n [SMOD I ^ m • ⊤]
L : R
n✝ : ℕ
hL : f (n✝ + 1) - L ∈ I ^ (n✝ + 1)
⊢ -(x * y - 1) * f (n✝ + 1) - 1 ∈ I ^ (n✝ + 1)

Tactic:
neg_mul,

Goal state after:
case h.succ
R : Type u_1
inst✝¹ : CommRing R
I : Ideal R
inst✝ : IsAdicComplete I R
x : R
hx : x ∈ I
y : R
f : ℕ → R := fun n ↦ ∑ i ∈ range n, (x * y) ^ i
hf : ∀ (m n : ℕ), m ≤ n → f m ≡ f n [SMOD I ^ m • ⊤]
L : R
n✝ : ℕ
hL : f (n✝ + 1) - L ∈ I ^ (n✝ + 1)
⊢ -((x * y - 1) * f (n✝ + 1)) - 1 ∈ I ^ (n✝ + 1)
Module: Mathlib.RingTheory.Valuation.Basic

Goal state before:
pp: K : Type u_1
F : Type u_2
R : Type u_3
inst✝² : DivisionRing K
Γ₀ : Type u_4
Γ'₀ : Type u_5
Γ''₀ : Type u_6
inst✝¹ : Ring R
inst✝ : LinearOrderedCommGroupWithZero Γ₀
v✝ : Valuation R Γ₀
x y : R
v : Valuation R Γ₀
γ : Γ₀
⊢ 0 ∈ {x | v x ≤ γ}

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.Basic

Goal state before:
pp: R : Type u_3
Γ₀ : Type u_4
inst✝¹ : Ring R
inst✝ : LinearOrderedCommGroupWithZero Γ₀
v : Valuation R Γ₀
x : R
g : (ofClass v).ValueGroup₀
⊢ embedding (v.restrict x) < embedding g ↔ v x < embedding g

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.Basic

Goal state before:
pp: R : Type u_3
Γ₀ : Type u_4
inst✝¹ : Ring R
inst✝ : LinearOrderedCommGroupWithZero Γ₀
v : Valuation R Γ₀
x : R
g : (ofClass v).ValueGroup₀
⊢ embedding (v.restrict x) ≤ embedding g ↔ v x ≤ embedding g

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.Basic

Goal state before:
pp: K : Type u_1
F : Type u_2
R : Type u_3
inst✝² : DivisionRing K
Γ₀ : Type u_4
Γ'₀ : Type u_5
Γ''₀ : Type u_6
inst✝¹ : Ring R
inst✝ : LinearOrderedCommGroupWithZero Γ₀
v : Valuation R Γ₀
x✝ y x : R
hx : v x ≠ 0
⊢ (ofClass v) 1 ≠ 0

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.Basic

Goal state before:
pp: R : Type u_3
Γ₀ : Type u_4
inst✝¹ : Ring R
inst✝ : LinearOrderedCommGroupWithZero Γ₀
v : Valuation R Γ₀
x y : R
⊢ embedding (v.restrict x) = embedding (v.restrict y) ↔ v x = v y

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.Valuation.Basic

Goal state before:
pp: R : Type u_3
Γ₀ : Type u_4
inst✝¹ : Ring R
inst✝ : LinearOrderedCommGroupWithZero Γ₀
v : Valuation R Γ₀
γ : (ofClass v).ValueGroup₀ˣ
u : ↥(ofClass v).valueGroup := WithZero.unzero ⋯
hu_def : u = WithZero.unzero ⋯
a : R
ha : (ofClass v) a ≠ 0
x : R
hax : (ofClass v) a * ↑↑u = (ofClass v) x
⊢ 0 < v x

Tactic:
← restrict_pos_iff,

Goal state after:
R : Type u_3
Γ₀ : Type u_4
inst✝¹ : Ring R
inst✝ : LinearOrderedCommGroupWithZero Γ₀
v : Valuation R Γ₀
γ : (ofClass v).ValueGroup₀ˣ
u : ↥(ofClass v).valueGroup := WithZero.unzero ⋯
hu_def : u = WithZero.unzero ⋯
a : R
ha : (ofClass v) a ≠ 0
x : R
hax : (ofClass v) a * ↑↑u = (ofClass v) x
⊢ 0 < v.restrict x
Module: Mathlib.RingTheory.Jacobson.Ring

Goal state before:
pp: S : Type u_2
inst✝¹⁰ : CommRing S
inst✝⁹ : IsDomain S
R : Type u_5
inst✝⁸ : CommRing R
inst✝⁷ : IsDomain R
inst✝⁶ : IsJacobsonRing R
Rₘ : Type u_6
Sₘ : Type u_7
inst✝⁵ : CommRing Rₘ
inst✝⁴ : CommRing Sₘ
φ : R →+* S
hφ : Function.Injective ⇑φ
x : R
hx : x ≠ 0
inst✝³ : Algebra R Rₘ
inst✝² : IsLocalization.Away x Rₘ
inst✝¹ : Algebra S Sₘ
inst✝ : IsLocalization (Submonoid.map φ (Submonoid.powers x)) Sₘ
hφ' : (IsLocalization.map Sₘ φ ⋯).IsIntegral
hM : Submonoid.map φ (Submonoid.powers x) ≤ nonZeroDivisors S
this✝ : IsDomain Sₘ := IsLocalization.isDomain_of_le_nonZeroDivisors Sₘ hM
φ' : Rₘ →+* Sₘ := IsLocalization.map Sₘ φ ⋯
this : ∀ (I : Ideal Sₘ), I.IsMaximal → (comap (algebraMap S Sₘ) I).IsMaximal
⊢ comap (algebraMap S Sₘ) ⊥ = ⊥

Tactic:
rw [← RingHom.ker_eq_comap_bot, ← RingHom.injective_iff_ker_eq_bot]

Goal state after:
S : Type u_2
inst✝¹⁰ : CommRing S
inst✝⁹ : IsDomain S
R : Type u_5
inst✝⁸ : CommRing R
inst✝⁷ : IsDomain R
inst✝⁶ : IsJacobsonRing R
Rₘ : Type u_6
Sₘ : Type u_7
inst✝⁵ : CommRing Rₘ
inst✝⁴ : CommRing Sₘ
φ : R →+* S
hφ : Function.Injective ⇑φ
x : R
hx : x ≠ 0
inst✝³ : Algebra R Rₘ
inst✝² : IsLocalization.Away x Rₘ
inst✝¹ : Algebra S Sₘ
inst✝ : IsLocalization (Submonoid.map φ (Submonoid.powers x)) Sₘ
hφ' : (IsLocalization.map Sₘ φ ⋯).IsIntegral
hM : Submonoid.map φ (Submonoid.powers x) ≤ nonZeroDivisors S
this✝ : IsDomain Sₘ := IsLocalization.isDomain_of_le_nonZeroDivisors Sₘ hM
φ' : Rₘ →+* Sₘ := IsLocalization.map Sₘ φ ⋯
this : ∀ (I : Ideal Sₘ), I.IsMaximal → (comap (algebraMap S Sₘ) I).IsMaximal
⊢ Function.Injective ⇑(algebraMap S Sₘ)
Module: Mathlib.RingTheory.Valuation.Basic

Goal state before:
pp: K : Type u_1
F : Type u_2
R : Type u_3
inst✝² : DivisionRing K
Γ₀ : Type u_4
Γ'₀ : Type u_5
Γ''₀ : Type u_6
inst✝¹ : Ring R
inst✝ : LinearOrderedCommGroupWithZero Γ₀
v✝ : Valuation R Γ₀
x y : R
v : Valuation R Γ₀
γ : Γ₀ˣ
⊢ 0 ∈ {x | v x < ↑γ}

Tactic:
by simp

Goal state after:
Module: Mathlib.RingTheory.DedekindDomain.Dvr

Goal state before:
pp: A : Type u_1
inst✝⁶ : CommRing A
inst✝⁵ : IsDomain A
inst✝⁴ : IsDedekindDomain A
M : Submonoid A
hM : M ≤ A⁰
Aₘ : Type u_2
inst✝³ : CommRing Aₘ
inst✝² : IsDomain Aₘ
inst✝¹ : Algebra A Aₘ
inst✝ : IsLocalization M Aₘ
h : ∀ (y : ↥M), IsUnit ((algebraMap A (FractionRing A)) ↑y)
this : Algebra Aₘ (FractionRing A) := (lift h).toAlgebra
⊢ IsDedekindDomain Aₘ

Tactic:
have : IsScalarTower A Aₘ (FractionRing A) :=
    IsScalarTower.of_algebraMap_eq fun x => (IsLocalization.lift_eq h x).symm

Goal state after:
A : Type u_1
inst✝⁶ : CommRing A
inst✝⁵ : IsDomain A
inst✝⁴ : IsDedekindDomain A
M : Submonoid A
hM : M ≤ A⁰
Aₘ : Type u_2
inst✝³ : CommRing Aₘ
inst✝² : IsDomain Aₘ
inst✝¹ : Algebra A Aₘ
inst✝ : IsLocalization M Aₘ
h : ∀ (y : ↥M), IsUnit ((algebraMap A (FractionRing A)) ↑y)
this✝ : Algebra Aₘ (FractionRing A) := (lift h).toAlgebra
this : IsScalarTower A Aₘ (FractionRing A)
⊢ IsDedekindDomain Aₘ
Module: Mathlib.RingTheory.Valuation.Basic

Goal state before:
pp: K : Type u_7
inst✝¹ : DivisionRing K
Γ₀ : Type u_8
inst✝ : LinearOrderedCommGroupWithZero Γ₀
v : Valuation K Γ₀
h : v.IsNontrivial
⊢ ∃ x, 1 < v x

Tactic:
by simpa using h.exists_one_lt (v := v)

Goal state after: