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

Goal state before:
pp: l : Type u_1
R : Type u_2
inst✝³ : DecidableEq l
inst✝² : Fintype l
inst✝¹ : CommRing R
A B C D : Matrix l l R
inst✝ : IsLocalRing R
hA : fromBlocks A B C D ∈ symplecticGroup l R
k : Type u_2 := IsLocalRing.ResidueField R
f : R →+* IsLocalRing.ResidueField R := IsLocalRing.residue R
A' : Matrix l l (IsLocalRing.ResidueField R) := f.mapMatrix A
C' : Matrix l l (IsLocalRing.ResidueField R) := f.mapMatrix C
F' : Matrix (l ⊕ l) (l ⊕ l) (IsLocalRing.ResidueField R) := fromBlocks A' (f.mapMatrix B) C' (f.mapMatrix D)
F'_def : F' = fromBlocks A' (f.mapMatrix B) C' (f.mapMatrix D)
hF' : IsUnit F'
hker : ∀ (x : l → k), A' *ᵥ x = 0 → C' *ᵥ x = 0 → x = 0
⊢ f.mapMatrix Aᵀ * f.mapMatrix C = f.mapMatrix Cᵀ * f.mapMatrix A

Tactic:
← map_mul,

Goal state after:
l : Type u_1
R : Type u_2
inst✝³ : DecidableEq l
inst✝² : Fintype l
inst✝¹ : CommRing R
A B C D : Matrix l l R
inst✝ : IsLocalRing R
hA : fromBlocks A B C D ∈ symplecticGroup l R
k : Type u_2 := IsLocalRing.ResidueField R
f : R →+* IsLocalRing.ResidueField R := IsLocalRing.residue R
A' : Matrix l l (IsLocalRing.ResidueField R) := f.mapMatrix A
C' : Matrix l l (IsLocalRing.ResidueField R) := f.mapMatrix C
F' : Matrix (l ⊕ l) (l ⊕ l) (IsLocalRing.ResidueField R) := fromBlocks A' (f.mapMatrix B) C' (f.mapMatrix D)
F'_def : F' = fromBlocks A' (f.mapMatrix B) C' (f.mapMatrix D)
hF' : IsUnit F'
hker : ∀ (x : l → k), A' *ᵥ x = 0 → C' *ᵥ x = 0 → x = 0
⊢ f.mapMatrix (Aᵀ * C) = f.mapMatrix Cᵀ * f.mapMatrix A
Module: Mathlib.Algebra.MonoidAlgebra.Grading

Goal state before:
pp: case refine_2
M : Type u_1
ι : Type u_2
R : Type u_3
inst✝³ : AddMonoid M
inst✝² : DecidableEq ι
inst✝¹ : AddMonoid ι
inst✝ : CommSemiring R
f : M →+ ι
i : ι
x : R[M]
m : M
b : R
y : R[M]
hmy : m ∉ y.coeff.support
⊢ b ≠ 0 →
    (∀ (hx : y ∈ gradeBy R (⇑f) i),
        (decomposeAux f) ↑⟨y, hx⟩ = (DirectSum.of (fun i ↦ ↥(gradeBy R (⇑f) i)) i) ⟨y, hx⟩) →
      ∀ (hx : single m b + y ∈ gradeBy R (⇑f) i),
        (decomposeAux f) ↑⟨single m b + y, hx⟩ = (DirectSum.of (fun i ↦ ↥(gradeBy R (⇑f) i)) i) ⟨single m b + y, hx⟩

Tactic:
hb

Goal state after:
case refine_2
M : Type u_1
ι : Type u_2
R : Type u_3
inst✝³ : AddMonoid M
inst✝² : DecidableEq ι
inst✝¹ : AddMonoid ι
inst✝ : CommSemiring R
f : M →+ ι
i : ι
x : R[M]
m : M
b : R
y : R[M]
hmy : m ∉ y.coeff.support
hb : b ≠ 0
⊢ (∀ (hx : y ∈ gradeBy R (⇑f) i), (decomposeAux f) ↑⟨y, hx⟩ = (DirectSum.of (fun i ↦ ↥(gradeBy R (⇑f) i)) i) ⟨y, hx⟩) →
    ∀ (hx : single m b + y ∈ gradeBy R (⇑f) i),
      (decomposeAux f) ↑⟨single m b + y, hx⟩ = (DirectSum.of (fun i ↦ ↥(gradeBy R (⇑f) i)) i) ⟨single m b + y, hx⟩
Module: Mathlib.LinearAlgebra.TensorProduct.Decomposition

Goal state before:
pp: case refine_1
ι : Type u_1
R : Type u_2
M : Type u_3
S : Type u_4
inst✝⁶ : CommSemiring R
inst✝⁵ : AddCommMonoid M
inst✝⁴ : Module R M
ℳ : ι → Submodule R M
inst✝³ : DecidableEq ι
inst✝² : Decomposition ℳ
inst✝¹ : CommSemiring S
inst✝ : Algebra R S
⊢ (coeLinearMap fun i ↦ Submodule.baseChange S (ℳ i)) ∘ₗ
      (lmap fun x ↦ Submodule.toBaseChange S (ℳ x)) ∘ₗ
        ↑(directSumRight R S S fun i ↦ ↥(ℳ i)) ∘ₗ
          ↑(LinearEquiv.baseChange R S M (⨁ (i : ι), ↥(ℳ i)) (decomposeLinearEquiv ℳ)) =
    LinearMap.id

Tactic:
simp_rw [← comp_assoc]

Goal state after:
case refine_1
ι : Type u_1
R : Type u_2
M : Type u_3
S : Type u_4
inst✝⁶ : CommSemiring R
inst✝⁵ : AddCommMonoid M
inst✝⁴ : Module R M
ℳ : ι → Submodule R M
inst✝³ : DecidableEq ι
inst✝² : Decomposition ℳ
inst✝¹ : CommSemiring S
inst✝ : Algebra R S
⊢ (((coeLinearMap fun i ↦ Submodule.baseChange S (ℳ i)) ∘ₗ lmap fun x ↦ Submodule.toBaseChange S (ℳ x)) ∘ₗ
        ↑(directSumRight R S S fun i ↦ ↥(ℳ i))) ∘ₗ
      ↑(LinearEquiv.baseChange R S M (⨁ (i : ι), ↥(ℳ i)) (decomposeLinearEquiv ℳ)) =
    LinearMap.id
Module: Mathlib.GroupTheory.Perm.Cycle.Concrete

Goal state before:
pp: case neg
α : Type u_1
inst✝¹ : Fintype α
inst✝ : DecidableEq α
f : Perm α
x : α
hx : ¬f x = x
y : α
hy : ¬f.SameCycle x y
⊢ (f.toList x).formPerm y = (f.cycleOf x) y

Tactic:
rw [cycleOf_apply_of_not_sameCycle hy, formPerm_apply_of_notMem]
    simp [mem_toList_iff, hy]

Goal state after:
Module: Mathlib.Algebra.Lie.Loop

Goal state before:
pp: R : Type u_1
A : Type u_2
L : Type u_3
inst✝⁵ : CommRing R
inst✝⁴ : LieRing L
inst✝³ : LieAlgebra R L
inst✝² : AddCommGroup A
inst✝¹ : DistribSMul A R
inst✝ : SMulCommClass A R R
Φ : LinearMap.BilinForm R L
f : loopAlgebra R A L
F : loopAlgebra R A L ≃ₗ[R] A →₀ L := toFinsupp R A L
r : R
x : loopAlgebra R A L
⊢ ∑ x_1 ∈ (F x).support, x_1 • (Φ ((F f) (-x_1))) ((r • F x) x_1) =
    (RingHom.id R) r • (F x).sum fun a v ↦ a • (Φ ((F f) (-a))) v

Tactic:
sum,

Goal state after:
R : Type u_1
A : Type u_2
L : Type u_3
inst✝⁵ : CommRing R
inst✝⁴ : LieRing L
inst✝³ : LieAlgebra R L
inst✝² : AddCommGroup A
inst✝¹ : DistribSMul A R
inst✝ : SMulCommClass A R R
Φ : LinearMap.BilinForm R L
f : loopAlgebra R A L
F : loopAlgebra R A L ≃ₗ[R] A →₀ L := toFinsupp R A L
r : R
x : loopAlgebra R A L
⊢ ∑ x_1 ∈ (F x).support, x_1 • (Φ ((F f) (-x_1))) ((r • F x) x_1) =
    (RingHom.id R) r • ∑ a ∈ (F x).support, a • (Φ ((F f) (-a))) ((F x) a)
Module: Mathlib.LinearAlgebra.Matrix.Determinant.Bird.Correctness

Goal state before:
pp: case refine_1
R : Type u_1
inst✝ : CommRing R
n : ℕ
A : Matrix (Fin n) (Fin n) R
p : ℕ
i j : Fin n
α : Fin (p + 1) → Fin n
k : Fin (p + 1)
hi : ∀ (j : Fin (p + 1)), i < α j
hiα : StrictMono α
α' : Fin (p + 1) → Fin n
k' : Fin (p + 1)
hj : ∀ (j : Fin (p + 1)), i < α' j
hiα' : StrictMono α'
hremove : k.removeNth α = k'.removeNth α'
hvalue : α k = α' k'
⊢ α = α' ∧ k = k'

Tactic:
suffices hrange : Set.range α = Set.range α' by
      rw [hiα.range_inj hiα'] at hrange
      subst α'
      exact ⟨rfl, hiα.injective hvalue⟩

Goal state after:
case refine_1
R : Type u_1
inst✝ : CommRing R
n : ℕ
A : Matrix (Fin n) (Fin n) R
p : ℕ
i j : Fin n
α : Fin (p + 1) → Fin n
k : Fin (p + 1)
hi : ∀ (j : Fin (p + 1)), i < α j
hiα : StrictMono α
α' : Fin (p + 1) → Fin n
k' : Fin (p + 1)
hj : ∀ (j : Fin (p + 1)), i < α' j
hiα' : StrictMono α'
hremove : k.removeNth α = k'.removeNth α'
hvalue : α k = α' k'
⊢ Set.range α = Set.range α'
Module: Mathlib.Algebra.Lie.LieTheorem

Goal state before:
pp: case h.refine_2
k : Type u_1
inst✝¹¹ : Field k
L : Type u_2
inst✝¹⁰ : LieRing L
inst✝⁹ : LieAlgebra k L
V : Type u_3
inst✝⁸ : AddCommGroup V
inst✝⁷ : Module k V
inst✝⁶ : LieRingModule L V
inst✝⁵ : LieModule k L V
inst✝⁴ : CharZero k
inst✝³ : Module.Finite k V
inst✝² : Nontrivial V
inst✝¹ : IsSolvable L
inst✝ : IsTriangularizable k L V
imL : LieSubalgebra k (Module.End k V) := (toEnd k L V).range
toEndo : L →ₗ[k] ↥imL := LinearMap.codRestrict imL.toSubmodule ↑(toEnd k L V) ⋯
χ : Module.Dual k ↥imL
h : Nontrivial ↥(weightSpace V ⇑χ)
v : V
hv : v ∈ weightSpace V ⇑χ
hv0 : ⟨v, hv⟩ ≠ 0
⊢ ⟨v, ⋯⟩ ≠ 0

Tactic:
· simpa using hv0

Goal state after:
Module: Mathlib.RingTheory.ChainOfDivisors

Goal state before:
pp: M : Type u_1
inst✝¹ : CommMonoidWithZero M
inst✝ : UniqueFactorizationMonoid M
q r : Associates M
n : ℕ
hn : n ≠ 0
c : Fin (n + 1) → Associates M
h₁ : StrictMono c
h₂ : ∀ {r : Associates M}, r ≤ q ↔ ∃ i, r = c i
hr : r ∣ q
hq : q ≠ 0
i : ℕ := (normalizedFactors r).card
b : Associates M
⊢ b ∈ normalizedFactors r → b = c 1

Tactic:
hb

Goal state after:
M : Type u_1
inst✝¹ : CommMonoidWithZero M
inst✝ : UniqueFactorizationMonoid M
q r : Associates M
n : ℕ
hn : n ≠ 0
c : Fin (n + 1) → Associates M
h₁ : StrictMono c
h₂ : ∀ {r : Associates M}, r ≤ q ↔ ∃ i, r = c i
hr : r ∣ q
hq : q ≠ 0
i : ℕ := (normalizedFactors r).card
b : Associates M
hb : b ∈ normalizedFactors r
⊢ b = c 1
Module: Mathlib.RingTheory.ChainOfDivisors

Goal state before:
pp: M : Type u_1
inst✝¹ : CommMonoidWithZero M
inst✝ : UniqueFactorizationMonoid M
q r : Associates M
n : ℕ
hn : n ≠ 0
c : Fin (n + 1) → Associates M
h₁ : StrictMono c
h₂ : ∀ {r : Associates M}, r ≤ q ↔ ∃ i, r = c i
hr : r ∣ q
hq : q ≠ 0
i : ℕ := (normalizedFactors r).card
hi : normalizedFactors r = Multiset.replicate i (c 1)
H : r = c 1 ^ i
this : (Finset.image (fun m ↦ c 1 ^ ↑m) Finset.univ).card = i + 1
⊢ ∀ (r : Associates M), (∃ a ∈ Finset.univ, c 1 ^ ↑a = r) → r ≤ q

Tactic:
rintro r ⟨a, _, rfl⟩

Goal state after:
M : Type u_1
inst✝¹ : CommMonoidWithZero M
inst✝ : UniqueFactorizationMonoid M
q r : Associates M
n : ℕ
hn : n ≠ 0
c : Fin (n + 1) → Associates M
h₁ : StrictMono c
h₂ : ∀ {r : Associates M}, r ≤ q ↔ ∃ i, r = c i
hr : r ∣ q
hq : q ≠ 0
i : ℕ := (normalizedFactors r).card
hi : normalizedFactors r = Multiset.replicate i (c 1)
H : r = c 1 ^ i
this : (Finset.image (fun m ↦ c 1 ^ ↑m) Finset.univ).card = i + 1
a : Fin (i + 1)
left✝ : a ∈ Finset.univ
⊢ c 1 ^ ↑a ≤ q
Module: Mathlib.RingTheory.FractionalIdeal.Basic

Goal state before:
pp: case right
R : Type u_1
inst✝² : CommRing R
S : Submonoid R
P : Type u_2
inst✝¹ : CommRing P
inst✝ : Algebra R P
I : Submodule R P
h : I ≤ 1
b : P
⊢ b ∈ I → IsInteger R (1 • b)

Tactic:
hb

Goal state after:
case right
R : Type u_1
inst✝² : CommRing R
S : Submonoid R
P : Type u_2
inst✝¹ : CommRing P
inst✝ : Algebra R P
I : Submodule R P
h : I ≤ 1
b : P
hb : b ∈ I
⊢ IsInteger R (1 • b)
Module: Mathlib.RingTheory.ChainOfDivisors

Goal state before:
pp: M : Type u_1
inst✝⁴ : CommMonoidWithZero M
inst✝³ : IsCancelMulZero M
N : Type u_2
inst✝² : CommMonoidWithZero N
inst✝¹ : UniqueFactorizationMonoid N
inst✝ : UniqueFactorizationMonoid M
m p : Associates M
n : Associates N
hn : n ≠ 0
hp : p ∈ normalizedFactors m
d : ↑(Set.Iic m) ≃o ↑(Set.Iic n)
s : ℕ
hs' : p ^ s ≤ m
hs : ¬s = 0
this : ↑(d ⟨p, ⋯⟩) ^ s = ↑(d ⟨p ^ s, hs'⟩)
⊢ ↑(d ⟨p, ⋯⟩) ^ s ≤ n

Tactic:
rw [this]
    apply Subtype.prop (d ⟨p ^ s, hs'⟩)

Goal state after:
Module: Mathlib.RingTheory.ChainOfDivisors

Goal state before:
pp: case neg.refine_1
M : Type u_1
inst✝⁴ : CommMonoidWithZero M
inst✝³ : IsCancelMulZero M
N : Type u_2
inst✝² : CommMonoidWithZero N
inst✝¹ : UniqueFactorizationMonoid N
inst✝ : UniqueFactorizationMonoid M
m : Associates M
n : Associates N
hn : n ≠ 0
d : ↑(Set.Iic m) ≃o ↑(Set.Iic n)
s : ℕ
hs : ¬s = 0
c₁ : Fin (s + 1) → Associates M
hp : c₁ 1 ∈ normalizedFactors m
hs' : c₁ 1 ^ s ≤ m
hc₁' : StrictMono c₁
hc₁'' : ∀ {r : Associates M}, r ≤ c₁ 1 ^ s ↔ ∃ i, r = c₁ i
c₂ : Fin (s + 1) → Associates N := fun t ↦ ↑(d ⟨c₁ t, ⋯⟩)
c₂_def : ∀ (t : Fin (s + 1)), c₂ t = ↑(d ⟨c₁ t, ⋯⟩)
t u : Fin (s + 1)
h : t < u
⊢ c₂ t < c₂ u

Tactic:
rw [c₂_def, c₂_def, Subtype.coe_lt_coe, d.lt_iff_lt, Subtype.mk_lt_mk, hc₁'.lt_iff_lt]
    exact h

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

Goal state before:
pp: case mp.refine_1
R : Type u_1
inst✝² : CommRing R
S : Submonoid R
P : Type u_2
inst✝¹ : CommRing P
inst✝ : Algebra R P
J : FractionalIdeal S P
hJ : J ≤ 1
a b : R
ha : a ∈ {x | (algebraMap R P) x ∈ J}
⊢ b ∈ {x | (algebraMap R P) x ∈ J} → a + b ∈ {x | (algebraMap R P) x ∈ J}

Tactic:
hb

Goal state after:
case mp.refine_1
R : Type u_1
inst✝² : CommRing R
S : Submonoid R
P : Type u_2
inst✝¹ : CommRing P
inst✝ : Algebra R P
J : FractionalIdeal S P
hJ : J ≤ 1
a b : R
ha : a ∈ {x | (algebraMap R P) x ∈ J}
hb : b ∈ {x | (algebraMap R P) x ∈ J}
⊢ a + b ∈ {x | (algebraMap R P) x ∈ J}
Module: Mathlib.RingTheory.ChainOfDivisors

Goal state before:
pp: M : Type u_1
inst✝⁶ : CommMonoidWithZero M
inst✝⁵ : IsCancelMulZero M
N : Type u_2
inst✝⁴ : CommMonoidWithZero N
inst✝³ : Subsingleton Mˣ
inst✝² : Subsingleton Nˣ
inst✝¹ : UniqueFactorizationMonoid M
inst✝ : UniqueFactorizationMonoid N
m p : M
n : N
hm : m ≠ 0
hn : n ≠ 0
hp : p ∈ normalizedFactors m
d : { l // l ∣ m } ≃ { l // l ∣ n }
hd : ∀ (l l' : { l // l ∣ m }), ↑(d l) ∣ ↑(d l') ↔ ↑l ∣ ↑l'
⊢ associatesEquivOfUniqueUnits (associatesEquivOfUniqueUnits.symm p) ∣ m

Tactic:
simp only [dvd_of_mem_normalizedFactors hp, associatesEquivOfUniqueUnits_symm_apply,
      associatesEquivOfUniqueUnits_apply, out_mk, normalize_eq]

Goal state after:
Module: Mathlib.RingTheory.FractionalIdeal.Operations

Goal state before:
pp: case h.right
R₁ : Type u_3
inst✝⁴ : CommRing R₁
K : Type u_4
inst✝³ : Field K
inst✝² : Algebra R₁ K
inst✝¹ : IsFractionRing R₁ K
inst✝ : IsDomain R₁
I J : Submodule R₁ K
aI : R₁
haI : aI ∈ R₁⁰
hI : ∀ b ∈ I, IsInteger R₁ (aI • b)
aJ : R₁
haJ : aJ ∈ R₁⁰
hJ : ∀ b ∈ J, IsInteger R₁ (aJ • b)
h : J ≠ 0
y : K
mem_J : y ∈ J
notMem_zero : y ∉ 0
y' : R₁
hy' : (algebraMap R₁ K) y' = aJ • y
b : K
⊢ b ∈ I / J → IsInteger R₁ ((aI * y') • b)

Tactic:
hb

Goal state after:
case h.right
R₁ : Type u_3
inst✝⁴ : CommRing R₁
K : Type u_4
inst✝³ : Field K
inst✝² : Algebra R₁ K
inst✝¹ : IsFractionRing R₁ K
inst✝ : IsDomain R₁
I J : Submodule R₁ K
aI : R₁
haI : aI ∈ R₁⁰
hI : ∀ b ∈ I, IsInteger R₁ (aI • b)
aJ : R₁
haJ : aJ ∈ R₁⁰
hJ : ∀ b ∈ J, IsInteger R₁ (aJ • b)
h : J ≠ 0
y : K
mem_J : y ∈ J
notMem_zero : y ∉ 0
y' : R₁
hy' : (algebraMap R₁ K) y' = aJ • y
b : K
hb : b ∈ I / J
⊢ IsInteger R₁ ((aI * y') • b)
Module: Mathlib.RingTheory.DedekindDomain.Ideal.Basic

Goal state before:
pp: A : Type u_2
K : Type u_3
inst✝⁴ : CommRing A
inst✝³ : Field K
inst✝² : Algebra A K
inst✝¹ : IsFractionRing A K
inst✝ : IsDedekindDomain A
I : Ideal A
hI0 : I ≠ ⊥
hJ0 : ¬↑I * (↑I)⁻¹ = 0
x : K
hx : x ∈ (↑I * (↑I)⁻¹)⁻¹
b : K
⊢ b ∈ (↑I)⁻¹ → x * b ∈ (↑I)⁻¹

Tactic:
hb

Goal state after:
A : Type u_2
K : Type u_3
inst✝⁴ : CommRing A
inst✝³ : Field K
inst✝² : Algebra A K
inst✝¹ : IsFractionRing A K
inst✝ : IsDedekindDomain A
I : Ideal A
hI0 : I ≠ ⊥
hJ0 : ¬↑I * (↑I)⁻¹ = 0
x : K
hx : x ∈ (↑I * (↑I)⁻¹)⁻¹
b : K
hb : b ∈ (↑I)⁻¹
⊢ x * b ∈ (↑I)⁻¹
Module: Mathlib.RingTheory.DedekindDomain.Ideal.Basic

Goal state before:
pp: case inr
R : Type u_1
A : Type u_2
K : Type u_3
inst✝⁵ : CommRing R
inst✝⁴ : CommRing A
inst✝³ : Field K
inst✝² : Algebra A K
inst✝¹ : IsFractionRing A K
inst✝ : IsDomain A
h : IsDedekindDomainInv A
I✝ J✝ I J : FractionalIdeal A⁰ K
hJ : J ≠ 0
⊢ I / J = I * J⁻¹

Tactic:
refine le_antisymm ?_ ((FractionalIdeal.le_div_iff_mul_le hJ).2 ?_)

Goal state after:
case inr.refine_1
R : Type u_1
A : Type u_2
K : Type u_3
inst✝⁵ : CommRing R
inst✝⁴ : CommRing A
inst✝³ : Field K
inst✝² : Algebra A K
inst✝¹ : IsFractionRing A K
inst✝ : IsDomain A
h : IsDedekindDomainInv A
I✝ J✝ I J : FractionalIdeal A⁰ K
hJ : J ≠ 0
⊢ I / J ≤ I * J⁻¹

case inr.refine_2
R : Type u_1
A : Type u_2
K : Type u_3
inst✝⁵ : CommRing R
inst✝⁴ : CommRing A
inst✝³ : Field K
inst✝² : Algebra A K
inst✝¹ : IsFractionRing A K
inst✝ : IsDomain A
h : IsDedekindDomainInv A
I✝ J✝ I J : FractionalIdeal A⁰ K
hJ : J ≠ 0
⊢ I * J⁻¹ * J ≤ I
Module: Mathlib.RingTheory.DedekindDomain.Ideal.Basic

Goal state before:
pp: A : Type u_2
inst✝¹ : CommRing A
inst✝ : IsDomain A
h : IsDedekindDomainInv A
this : CommGroupWithZero (FractionalIdeal A⁰ (FractionRing A)) := commGroupWithZero (FractionRing A) h
P : Ideal A
P_ne : P ≠ ⊥
hP : P.IsPrime
M : Ideal A
hM : P < M
P'_ne : ↑P ≠ 0
M'_ne : ↑M ≠ 0
le_one : (↑M)⁻¹ * ↑P ≤ 1
y : A
_hy : y ∈ ⊤
hx : (algebraMap A (FractionRing A)) y ∈ (↑M)⁻¹ * ↑P
z : A
hzM : z ∈ M
hzp : z ∉ P
zy_mem : (algebraMap A (FractionRing A)) z * (algebraMap A (FractionRing A)) y ∈ ↑M * ((↑M)⁻¹ * ↑P)
⊢ (algebraMap A (FractionRing A)) y ∈ ↑P

Tactic:
← map_mul,

Goal state after:
A : Type u_2
inst✝¹ : CommRing A
inst✝ : IsDomain A
h : IsDedekindDomainInv A
this : CommGroupWithZero (FractionalIdeal A⁰ (FractionRing A)) := commGroupWithZero (FractionRing A) h
P : Ideal A
P_ne : P ≠ ⊥
hP : P.IsPrime
M : Ideal A
hM : P < M
P'_ne : ↑P ≠ 0
M'_ne : ↑M ≠ 0
le_one : (↑M)⁻¹ * ↑P ≤ 1
y : A
_hy : y ∈ ⊤
hx : (algebraMap A (FractionRing A)) y ∈ (↑M)⁻¹ * ↑P
z : A
hzM : z ∈ M
hzp : z ∉ P
zy_mem : (algebraMap A (FractionRing A)) (z * y) ∈ ↑M * ((↑M)⁻¹ * ↑P)
⊢ (algebraMap A (FractionRing A)) y ∈ ↑P
Module: Mathlib.RingTheory.DedekindDomain.Ideal.Basic

Goal state before:
pp: case h
A : Type u_2
inst✝¹ : CommRing A
inst✝ : IsDedekindDomain A
I J : Ideal A
h : J ≤ I
hI : ¬I = ⊥
hI' : ↑I ≠ 0
this : (↑I)⁻¹ * ↑J ≤ 1
H : Ideal A
hH : ↑H = (↑I)⁻¹ * ↑J
⊢ ↑J = ↑(I * H)

Tactic:
coeIdeal_mul,

Goal state after:
case h
A : Type u_2
inst✝¹ : CommRing A
inst✝ : IsDedekindDomain A
I J : Ideal A
h : J ≤ I
hI : ¬I = ⊥
hI' : ↑I ≠ 0
this : (↑I)⁻¹ * ↑J ≤ 1
H : Ideal A
hH : ↑H = (↑I)⁻¹ * ↑J
⊢ ↑J = ↑I * ↑H
Module: Mathlib.RingTheory.DedekindDomain.Ideal.Basic

Goal state before:
pp: R : Type u_1
A : Type u_2
K : Type u_3
inst✝⁵ : CommRing R
inst✝⁴ : CommRing A
inst✝³ : Field K
inst✝² : IsDedekindDomain A
inst✝¹ : Algebra A K
inst✝ : IsFractionRing A K
P : Ideal A
hirr : Irreducible P
I J✝ J : Ideal A
hJ : P < J
⊢ J = ⊤

Tactic:
obtain ⟨_J_ne, H, hunit, P_eq⟩ := Ideal.dvdNotUnit_iff_lt.mpr hJ

Goal state after:
R : Type u_1
A : Type u_2
K : Type u_3
inst✝⁵ : CommRing R
inst✝⁴ : CommRing A
inst✝³ : Field K
inst✝² : IsDedekindDomain A
inst✝¹ : Algebra A K
inst✝ : IsFractionRing A K
P : Ideal A
hirr : Irreducible P
I J✝ J : Ideal A
hJ : P < J
_J_ne : J ≠ 0
H : Ideal A
hunit : ¬IsUnit H
P_eq : P = J * H
⊢ J = ⊤
Module: Mathlib.RingTheory.FractionalIdeal.Operations

Goal state before:
pp: R₁ : Type u_3
inst✝³ : CommRing R₁
K : Type u_4
inst✝² : Field K
inst✝¹ : Algebra R₁ K
inst✝ : IsFractionRing R₁ K
I J : Ideal R₁
x y : R₁
hy : y ∈ R₁⁰
this : spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * spanSingleton R₁⁰ ((algebraMap R₁ K) y) = 1
y' : (FractionalIdeal R₁⁰ K)ˣ :=
  Units.mkOfMulEqOne (spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩)) (spanSingleton R₁⁰ ((algebraMap R₁ K) y)) this
coe_y' : ↑y' = spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩)
⊢ spanSingleton R₁⁰ (mk' K x ⟨y, hy⟩) * ↑I = ↑J ↔
    spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * ↑(Ideal.span {x} * I) =
      spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * ↑(Ideal.span {y} * J)

Tactic:
coeIdeal_mul,

Goal state after:
R₁ : Type u_3
inst✝³ : CommRing R₁
K : Type u_4
inst✝² : Field K
inst✝¹ : Algebra R₁ K
inst✝ : IsFractionRing R₁ K
I J : Ideal R₁
x y : R₁
hy : y ∈ R₁⁰
this : spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * spanSingleton R₁⁰ ((algebraMap R₁ K) y) = 1
y' : (FractionalIdeal R₁⁰ K)ˣ :=
  Units.mkOfMulEqOne (spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩)) (spanSingleton R₁⁰ ((algebraMap R₁ K) y)) this
coe_y' : ↑y' = spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩)
⊢ spanSingleton R₁⁰ (mk' K x ⟨y, hy⟩) * ↑I = ↑J ↔
    spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * (↑(Ideal.span {x}) * ↑I) =
      spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * ↑(Ideal.span {y} * J)
Module: Mathlib.RingTheory.FractionalIdeal.Operations

Goal state before:
pp: R₁ : Type u_3
inst✝³ : CommRing R₁
K : Type u_4
inst✝² : Field K
inst✝¹ : Algebra R₁ K
inst✝ : IsFractionRing R₁ K
I J : Ideal R₁
x y : R₁
hy : y ∈ R₁⁰
this : spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * spanSingleton R₁⁰ ((algebraMap R₁ K) y) = 1
y' : (FractionalIdeal R₁⁰ K)ˣ :=
  Units.mkOfMulEqOne (spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩)) (spanSingleton R₁⁰ ((algebraMap R₁ K) y)) this
coe_y' : ↑y' = spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩)
⊢ spanSingleton R₁⁰ (mk' K x ⟨y, hy⟩) * ↑I = ↑J ↔
    spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * (spanSingleton R₁⁰ ((algebraMap R₁ K) x) * ↑I) =
      spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * ↑(Ideal.span {y} * J)

Tactic:
coeIdeal_mul,

Goal state after:
R₁ : Type u_3
inst✝³ : CommRing R₁
K : Type u_4
inst✝² : Field K
inst✝¹ : Algebra R₁ K
inst✝ : IsFractionRing R₁ K
I J : Ideal R₁
x y : R₁
hy : y ∈ R₁⁰
this : spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * spanSingleton R₁⁰ ((algebraMap R₁ K) y) = 1
y' : (FractionalIdeal R₁⁰ K)ˣ :=
  Units.mkOfMulEqOne (spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩)) (spanSingleton R₁⁰ ((algebraMap R₁ K) y)) this
coe_y' : ↑y' = spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩)
⊢ spanSingleton R₁⁰ (mk' K x ⟨y, hy⟩) * ↑I = ↑J ↔
    spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * (spanSingleton R₁⁰ ((algebraMap R₁ K) x) * ↑I) =
      spanSingleton R₁⁰ (mk' K 1 ⟨y, hy⟩) * (↑(Ideal.span {y}) * ↑J)
Module: Mathlib.RingTheory.DedekindDomain.Ideal.Lemmas

Goal state before:
pp: A : Type u_2
K : Type u_3
inst✝⁴ : CommRing A
inst✝³ : Field K
inst✝² : IsDedekindDomain A
inst✝¹ : Algebra A K
inst✝ : IsFractionRing A K
I J : FractionalIdeal A⁰ K
hI : I ≠ 0
hJ : J ≠ 0
⊢ I⁻¹ ≤ J⁻¹ ↔ J ≤ I

Tactic:
le_inv_comm (inv_ne_zero hI) hJ,

Goal state after:
A : Type u_2
K : Type u_3
inst✝⁴ : CommRing A
inst✝³ : Field K
inst✝² : IsDedekindDomain A
inst✝¹ : Algebra A K
inst✝ : IsFractionRing A K
I J : FractionalIdeal A⁰ K
hI : I ≠ 0
hJ : J ≠ 0
⊢ J ≤ I⁻¹⁻¹ ↔ J ≤ I
Module: Mathlib.RingTheory.FractionalIdeal.Operations

Goal state before:
pp: case h
R : Type u_5
S : Type u_6
K : Type u_7
L : Type u_8
inst✝⁹ : CommRing R
inst✝⁸ : IsDomain R
inst✝⁷ : CommRing S
inst✝⁶ : IsDomain S
inst✝⁵ : CommRing K
inst✝⁴ : CommRing L
inst✝³ : Algebra R K
inst✝² : Algebra S L
inst✝¹ : IsFractionRing R K
inst✝ : IsFractionRing S L
f : R ≃+* S
I : Submodule R K
r : R
hr0 : ¬r = 0
x : K
hx : x ∈ I
r' : R
hr' : (algebraMap R K) r' = r • x
⊢ (algebraMap S L) (f r') =
    (IsFractionRing.ringEquivOfRingEquiv f) ((algebraMap R K) r) * (IsFractionRing.ringEquivOfRingEquiv f) x

Tactic:
← map_mul,

Goal state after:
case h
R : Type u_5
S : Type u_6
K : Type u_7
L : Type u_8
inst✝⁹ : CommRing R
inst✝⁸ : IsDomain R
inst✝⁷ : CommRing S
inst✝⁶ : IsDomain S
inst✝⁵ : CommRing K
inst✝⁴ : CommRing L
inst✝³ : Algebra R K
inst✝² : Algebra S L
inst✝¹ : IsFractionRing R K
inst✝ : IsFractionRing S L
f : R ≃+* S
I : Submodule R K
r : R
hr0 : ¬r = 0
x : K
hx : x ∈ I
r' : R
hr' : (algebraMap R K) r' = r • x
⊢ (algebraMap S L) (f r') = (IsFractionRing.ringEquivOfRingEquiv f) ((algebraMap R K) r * x)
Module: Mathlib.Algebra.Module.FinitePresentation

Goal state before:
pp: case hs1
R : Type u_1
M : Type u_3
N : Type u_2
inst✝⁶ : Ring R
inst✝⁵ : AddCommGroup M
inst✝⁴ : Module R M
inst✝³ : AddCommGroup N
inst✝² : Module R N
inst✝¹ : FinitePresentation R N
l : M →ₗ[R] N
hl : Function.Surjective ⇑l
inst✝ : FinitePresentation R ↥l.ker
⊢ (Submodule.map l ⊤).FG

pp: case hs2
R : Type u_1
M : Type u_3
N : Type u_2
inst✝⁶ : Ring R
inst✝⁵ : AddCommGroup M
inst✝⁴ : Module R M
inst✝³ : AddCommGroup N
inst✝² : Module R N
inst✝¹ : FinitePresentation R N
l : M →ₗ[R] N
hl : Function.Surjective ⇑l
inst✝ : FinitePresentation R ↥l.ker
⊢ (⊤ ⊓ l.ker).FG

Tactic:
· rw [Submodule.map_top, LinearMap.range_eq_top.mpr hl]; exact Module.Finite.fg_top

Goal state after:
case hs2
R : Type u_1
M : Type u_3
N : Type u_2
inst✝⁶ : Ring R
inst✝⁵ : AddCommGroup M
inst✝⁴ : Module R M
inst✝³ : AddCommGroup N
inst✝² : Module R N
inst✝¹ : FinitePresentation R N
l : M →ₗ[R] N
hl : Function.Surjective ⇑l
inst✝ : FinitePresentation R ↥l.ker
⊢ (⊤ ⊓ l.ker).FG
Module: Mathlib.RingTheory.DedekindDomain.Ideal.Lemmas

Goal state before:
pp: case neg.refine_1
R : Type u_1
inst✝³ : CommRing R
inst✝² : IsDomain R
inst✝¹ : IsPrincipalIdealRing R
inst✝ : NormalizationMonoid R
a b : R
ha : a ∈ normalizedFactors b
hb : ¬b = 0
⊢ span {a} ≠ ⊥

Tactic:
by_contra h
      exact (prime_of_normalized_factor a ha).ne_zero (span_singleton_eq_bot.mp h)

Goal state after: