mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.NumberTheory.MulChar.Duality

Goal state before:
pp: M : Type u_1
R : Type u_2
inst✝³ : CommMonoid M
inst✝² : CommRing R
inst✝¹ : Finite M
inst✝ : HasEnoughRootsOfUnity R (Monoid.exponent Mˣ)
χ : MulChar M R
η : MulChar (MulChar M R) R
⊢ ((mulCharEquiv M R).symm ((mulCharEquiv M R) η)) χ = η χ

Tactic:
MulEquiv.symm_apply_apply

Goal state after:
M : Type u_1
R : Type u_2
inst✝³ : CommMonoid M
inst✝² : CommRing R
inst✝¹ : Finite M
inst✝ : HasEnoughRootsOfUnity R (Monoid.exponent Mˣ)
χ : MulChar M R
η : MulChar (MulChar M R) R
⊢ η χ = η χ
Module: Mathlib.NumberTheory.DiophantineApproximation.Basic

Goal state before:
pp: ξ : ℝ
n : ℕ
n_pos : 0 < n
j k : ℤ
hk₀ : 0 < k
hk₁ : k ≤ ↑n
h : |↑k * ξ - ↑j| ≤ 1 / (↑n + 1)
hk₀' : 0 < ↑k
hden : ↑(↑j / ↑k).den ≤ k
⊢ |ξ * ↑k - ↑j / ↑k * ↑k| ≤ 1 / (↑n + 1)

Tactic:
div_mul_cancel₀ _ hk₀'.ne',

Goal state after:
ξ : ℝ
n : ℕ
n_pos : 0 < n
j k : ℤ
hk₀ : 0 < k
hk₁ : k ≤ ↑n
h : |↑k * ξ - ↑j| ≤ 1 / (↑n + 1)
hk₀' : 0 < ↑k
hden : ↑(↑j / ↑k).den ≤ k
⊢ |ξ * ↑k - ↑j| ≤ 1 / (↑n + 1)
Module: Mathlib.NumberTheory.PellMatiyasevic

Goal state before:
pp: a : ℕ
a1 : 1 < a
i j n : ℕ
ipos : 0 < i
hin : i ≤ n
h : xn a1 j ≡ xn a1 i [MOD xn a1 n]
j' : ℕ := j % (4 * n)
n4 : 0 < 4 * n
jl : j' < 4 * n
jj : j ≡ j' [MOD 4 * n]
this : ∀ (j q : ℕ), xn a1 (j + 4 * n * q) ≡ xn a1 j [MOD xn a1 n]
ji : j' + i = 4 * n
⊢ j' + i ≡ 0 [MOD 4 * n]

Tactic:
by
        rw [ji]
        exact dvd_rfl.modEq_zero_nat

Goal state after:
Module: Mathlib.NumberTheory.SmoothNumbers

Goal state before:
pp: s : Finset ℕ
N : ℕ
hN : ¬Prime N
m : ℕ
hm : m ∈ factoredNumbers (insert N s)
p : ℕ
hp : p ∈ m.primeFactorsList
⊢ p ∈ s

Tactic:
exact Finset.mem_of_mem_insert_of_ne (hm.2 p hp)
    fun h ↦ hN <| h ▸ prime_of_mem_primeFactorsList hp

Goal state after:
Module: Mathlib.NumberTheory.DiophantineApproximation.Basic

Goal state before:
pp: ξ : ℝ
u v : ℤ
hv : 2 ≤ v
hv₀ hv₁ : 0 < ↑v
hv₂ : 0 < 2 * ↑v - 1
hcop : IsCoprime u v
left✝ : v = 1 → -(1 / 2) < ξ - ↑u
h : |↑⌊ξ⌋ - ↑u / ↑v| < (↑v * (2 * ↑v - 1))⁻¹
hf : ξ = ↑⌊ξ⌋
h' : ↑⌊ξ⌋ - ↑u / ↑v = (↑⌊ξ⌋ * ↑v - ↑u) / ↑v
⊢ 1 ≤ |⌊ξ⌋ * v - u|

Tactic:
rw [← zero_add (1 : ℤ), add_one_le_iff, abs_pos, sub_ne_zero]

Goal state after:
ξ : ℝ
u v : ℤ
hv : 2 ≤ v
hv₀ hv₁ : 0 < ↑v
hv₂ : 0 < 2 * ↑v - 1
hcop : IsCoprime u v
left✝ : v = 1 → -(1 / 2) < ξ - ↑u
h : |↑⌊ξ⌋ - ↑u / ↑v| < (↑v * (2 * ↑v - 1))⁻¹
hf : ξ = ↑⌊ξ⌋
h' : ↑⌊ξ⌋ - ↑u / ↑v = (↑⌊ξ⌋ * ↑v - ↑u) / ↑v
⊢ ⌊ξ⌋ * v ≠ u
Module: Mathlib.NumberTheory.SmoothNumbers

Goal state before:
pp: case right
s : Finset ℕ
p : ℕ
hp : Prime p
hs : p ∉ s
e m : ℕ
hm₀ : m ≠ 0
hm : ∀ p ∈ m.primeFactorsList, p ∈ s
hpm : ¬p ∣ m
⊢ List.filter (fun x ↦ decide (x ∈ s)) (p ^ e).primeFactorsList ++
      List.filter (fun x ↦ decide (x ∈ s)) m.primeFactorsList ~
    m.primeFactorsList

Tactic:
hp.primeFactorsList_pow,

Goal state after:
case right
s : Finset ℕ
p : ℕ
hp : Prime p
hs : p ∉ s
e m : ℕ
hm₀ : m ≠ 0
hm : ∀ p ∈ m.primeFactorsList, p ∈ s
hpm : ¬p ∣ m
⊢ List.filter (fun x ↦ decide (x ∈ s)) (replicate e p) ++ List.filter (fun x ↦ decide (x ∈ s)) m.primeFactorsList ~
    m.primeFactorsList
Module: Mathlib.NumberTheory.SmoothNumbers

Goal state before:
pp: s : Finset ℕ
p : ℕ
hp : Prime p
hs : p ∉ s
m : ℕ
hm₀ : m ≠ 0
hm : ∀ p_1 ∈ m.primeFactorsList, p_1 ∈ insert p s
⊢ (replicate (List.count p m.primeFactorsList) p).prod *
      ↑⟨(List.filter (fun x ↦ decide (x ∈ s)) m.primeFactorsList).prod, ⋯⟩ =
    m

Tactic:
← prod_append

Goal state after:
s : Finset ℕ
p : ℕ
hp : Prime p
hs : p ∉ s
m : ℕ
hm₀ : m ≠ 0
hm : ∀ p_1 ∈ m.primeFactorsList, p_1 ∈ insert p s
⊢ (replicate (List.count p m.primeFactorsList) p ++ List.filter (fun x ↦ decide (x ∈ s)) m.primeFactorsList).prod = m
Module: Mathlib.NumberTheory.SmoothNumbers

Goal state before:
pp: N : ℕ
hN : ¬Prime N
⊢ (N + 1).smoothNumbers = N.smoothNumbers

Tactic:
by
  simp only [smoothNumbers_eq_factoredNumbers, Finset.range_add_one, factoredNumbers_insert _ hN]

Goal state after:
Module: Mathlib.NumberTheory.SmoothNumbers

Goal state before:
pp: N k : ℕ
⊢ #(N.roughNumbersUpTo k) ≤ ∑ p ∈ (N + 1).primesBelow \ k.primesBelow, N / p

Tactic:
rw [roughNumbersUpTo_eq_biUnion]

Goal state after:
N k : ℕ
⊢ #(((N + 1).primesBelow \ k.primesBelow).biUnion fun p ↦ {m ∈ Finset.range (N + 1) | m ≠ 0 ∧ p ∣ m}) ≤
    ∑ p ∈ (N + 1).primesBelow \ k.primesBelow, N / p
Module: Mathlib.NumberTheory.ModularForms.JacobiTheta.Bounds

Goal state before:
pp: case inr.refine_1
a : ℝ
ha : 0 ≤ a
aux' : (fun t ↦ ((1 - rexp (-π * t)) ^ 2)⁻¹) =O[atTop] fun x ↦ 1
ha' : 0 < a
⊢ (fun t ↦ rexp (-π * (a ^ 2 + 1) * t) / (1 - rexp (-π * t)) ^ 2) =O[atTop] fun t ↦ rexp (-(π * a ^ 2) * t) * 1

Tactic:
refine (Eventually.isBigO ?_).mul aux'

Goal state after:
case inr.refine_1
a : ℝ
ha : 0 ≤ a
aux' : (fun t ↦ ((1 - rexp (-π * t)) ^ 2)⁻¹) =O[atTop] fun x ↦ 1
ha' : 0 < a
⊢ ∀ᶠ (x : ℝ) in atTop, ‖rexp (-π * (a ^ 2 + 1) * x)‖ ≤ rexp (-(π * a ^ 2) * x)
Module: Mathlib.NumberTheory.ModularForms.JacobiTheta.Bounds

Goal state before:
pp: case refine_1
a : ℝ
ha : a ∈ Ico 0 1
p : ℝ
hp : 0 < p
hp' : (fun t ↦ F_nat 0 a t - if a = 0 then 1 else 0) =O[atTop] fun t ↦ rexp (-p * t)
q : ℝ
hq : 0 < q
hq' : (fun t ↦ F_nat 0 (1 - a) t) =O[atTop] fun t ↦ rexp (-q * t)
this :
  (fun t ↦ F_int 0 (↑a) t - if a = 0 then 1 else 0) =ᶠ[atTop] fun t ↦
    (F_nat 0 a t - if a = 0 then 1 else 0) + F_nat 0 (1 - a) t
⊢ min p q ≤ p

pp: case refine_2
a : ℝ
ha : a ∈ Ico 0 1
p : ℝ
hp : 0 < p
hp' : (fun t ↦ F_nat 0 a t - if a = 0 then 1 else 0) =O[atTop] fun t ↦ rexp (-p * t)
q : ℝ
hq : 0 < q
hq' : (fun t ↦ F_nat 0 (1 - a) t) =O[atTop] fun t ↦ rexp (-q * t)
this :
  (fun t ↦ F_int 0 (↑a) t - if a = 0 then 1 else 0) =ᶠ[atTop] fun t ↦
    (F_nat 0 a t - if a = 0 then 1 else 0) + F_nat 0 (1 - a) t
⊢ min p q ≤ q

Tactic:
exacts [min_le_left .., min_le_right ..]

Goal state after:
Module: Mathlib.NumberTheory.ModularForms.JacobiTheta.Bounds

Goal state before:
pp: case refine_1
a : ℝ
ha : a ∈ Ico 0 1
p : ℝ
hp : 0 < p
hp' : F_nat 1 a =O[atTop] fun t ↦ rexp (-p * t)
q : ℝ
hq : 0 < q
hq' : F_nat 1 (1 - a) =O[atTop] fun t ↦ rexp (-q * t)
this : F_int 1 ↑a =ᶠ[atTop] fun t ↦ F_nat 1 a t + F_nat 1 (1 - a) t
⊢ min p q ≤ p

pp: case refine_2
a : ℝ
ha : a ∈ Ico 0 1
p : ℝ
hp : 0 < p
hp' : F_nat 1 a =O[atTop] fun t ↦ rexp (-p * t)
q : ℝ
hq : 0 < q
hq' : F_nat 1 (1 - a) =O[atTop] fun t ↦ rexp (-q * t)
this : F_int 1 ↑a =ᶠ[atTop] fun t ↦ F_nat 1 a t + F_nat 1 (1 - a) t
⊢ min p q ≤ q

Tactic:
exacts [min_le_left .., min_le_right ..]

Goal state after:
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaEven

Goal state before:
pp: case H
x : ℝ
hx : x ≤ 0
a' : ℝ
⊢ evenKernel (↑a') x = 0

Tactic:
| H a' =>

Goal state after:
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaEven

Goal state before:
pp: case H
a' : ℝ
⊢ ContinuousOn (evenKernel ↑a') (Ioi 0)

Tactic:
| H a' =>

Goal state after:
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaEven

Goal state before:
pp: case H
a' : ℝ
⊢ ContinuousOn (cosKernel ↑a') (Ioi 0)

Tactic:
| H a' =>

Goal state after:
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaEven

Goal state before:
pp: x : ℝ
hx : 0 < x
a : ℝ
h1 : I * ↑(1 / x) = -1 / (I * ↑x)
hx' : I * ↑x ≠ 0
h2 : ↑a * I * ↑x / (I * ↑x) = ↑a
⊢ 1 / (-(I * I * ↑x)) ^ (1 / 2) = 1 / ↑(x ^ (1 / 2))

Tactic:
I_mul_I,

Goal state after:
x : ℝ
hx : 0 < x
a : ℝ
h1 : I * ↑(1 / x) = -1 / (I * ↑x)
hx' : I * ↑x ≠ 0
h2 : ↑a * I * ↑x / (I * ↑x) = ↑a
⊢ 1 / (-(-1 * ↑x)) ^ (1 / 2) = 1 / ↑(x ^ (1 / 2))
Module: Mathlib.NumberTheory.LSeries.AbstractFuncEq

Goal state before:
pp: E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℂ E
P : WeakFEPair E
⊢ Tendsto (fun s ↦ s • P.Λ₀ s - s • (1 / s) • P.f₀ - s • (P.ε / (↑P.k - s)) • P.g₀) (𝓝[≠] 0) (𝓝 (-P.f₀))

Tactic:
(by simp : 𝓝 (-P.f₀) = 𝓝 (((0 : ℂ) • P.Λ₀ 0) - P.f₀ - 0))

Goal state after:
E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℂ E
P : WeakFEPair E
⊢ Tendsto (fun s ↦ s • P.Λ₀ s - s • (1 / s) • P.f₀ - s • (P.ε / (↑P.k - s)) • P.g₀) (𝓝[≠] 0) (𝓝 (0 • P.Λ₀ 0 - P.f₀ - 0))
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaOdd

Goal state before:
pp: z τ : ℂ
hτ : τ ≠ 0
⊢ -2 * ↑π = 2 * ↑π * (I * I)

Tactic:
I_mul_I,

Goal state after:
z τ : ℂ
hτ : τ ≠ 0
⊢ -2 * ↑π = 2 * ↑π * -1
Module: Mathlib.NumberTheory.LSeries.MellinEqDirichlet

Goal state before:
pp: case inl
ι : Type u_1
inst✝ : Countable ι
a : ι → ℂ
r : ι → ℝ
F : ℝ → ℂ
s : ℂ
hs : 0 < s.re
hF : ∀ t ∈ Ioi 0, HasSum (fun i ↦ if r i = 0 then 0 else a i * ↑(r i) * ↑(rexp (-π * r i ^ 2 * t))) (F t)
h_sum : Summable fun i ↦ ‖a i‖ / |r i| ^ s.re
hs₁ : s ≠ 0
hs₂ : 0 < (s + 1).re
hs₃ : s + 1 ≠ 0
this :
  ∀ (i : ι) (t : ℝ),
    a i * ↑(r i) * ↑(rexp (-π * r i ^ 2 * t)) = if r i = 0 then 0 else a i * ↑(r i) * ↑(rexp (-π * r i ^ 2 * t))
i : ι
h : r i = 0
⊢ ‖a i * 0‖ / 0 = ‖a i‖ / 0 ^ s.re

Tactic:
zero_rpow hs.ne',

Goal state after:
case inl
ι : Type u_1
inst✝ : Countable ι
a : ι → ℂ
r : ι → ℝ
F : ℝ → ℂ
s : ℂ
hs : 0 < s.re
hF : ∀ t ∈ Ioi 0, HasSum (fun i ↦ if r i = 0 then 0 else a i * ↑(r i) * ↑(rexp (-π * r i ^ 2 * t))) (F t)
h_sum : Summable fun i ↦ ‖a i‖ / |r i| ^ s.re
hs₁ : s ≠ 0
hs₂ : 0 < (s + 1).re
hs₃ : s + 1 ≠ 0
this :
  ∀ (i : ι) (t : ℝ),
    a i * ↑(r i) * ↑(rexp (-π * r i ^ 2 * t)) = if r i = 0 then 0 else a i * ↑(r i) * ↑(rexp (-π * r i ^ 2 * t))
i : ι
h : r i = 0
⊢ ‖a i * 0‖ / 0 = ‖a i‖ / 0
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaOdd

Goal state before:
pp: case H
x : ℝ
hx : x ≤ 0
a' : ℝ
⊢ oddKernel (↑a') x = 0

Tactic:
| H a' =>

Goal state after:
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaOdd

Goal state before:
pp: x : ℝ
hx : 0 < x
a : ℝ
h1 : -1 / (I * ↑(1 / x)) = I * ↑x
⊢ -(I * I) * ↑(1 / x) = 1 / ↑x

Tactic:
I_mul_I,

Goal state after:
x : ℝ
hx : 0 < x
a : ℝ
h1 : -1 / (I * ↑(1 / x)) = I * ↑x
⊢ - -1 * ↑(1 / x) = 1 / ↑x
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaEven

Goal state before:
pp: a : UnitAddCircle
s : ℂ
⊢ completedCosZeta (-a) s = completedCosZeta a s

Tactic:
by
  simp [completedCosZeta]

Goal state after:
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaEven

Goal state before:
pp: a b : UnitAddCircle
this :
  ∀ (s : ℂ),
    completedHurwitzZetaEven a s - completedHurwitzZetaEven b s =
      completedHurwitzZetaEven₀ a s - completedHurwitzZetaEven₀ b s -
        ((if a = 0 then 1 else 0) - if b = 0 then 1 else 0) / s
⊢ DifferentiableAt ℂ (fun x ↦ completedHurwitzZetaEven₀ a x - completedHurwitzZetaEven₀ b x) 1

Tactic:
apply DifferentiableAt.sub <;> apply differentiable_completedHurwitzZetaEven₀

Goal state after:
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaEven

Goal state before:
pp: a : UnitAddCircle
n : ℕ
⊢ hurwitzZetaEven a (-2 * (↑n + 1)) = 0

Tactic:
have : (-2 : ℂ) * (n + 1) ≠ 0 :=
    mul_ne_zero (neg_ne_zero.mpr two_ne_zero) (Nat.cast_add_one_ne_zero n)
  rw [hurwitzZetaEven, Function.update_of_ne this, Gammaℝ_eq_zero_iff.mpr ⟨n + 1, by simp⟩,
    div_zero]

Goal state after:
Module: Mathlib.NumberTheory.LSeries.HurwitzZetaEven

Goal state before:
pp: a : UnitAddCircle
hs' : 1 ≠ 1 ∨ a ≠ 0
x : ℂ
hx : x ∈ {0}ᶜ
⊢ cosZeta a x = completedCosZeta a x * x.Gammaℝ⁻¹

Tactic:
rw [cosZeta, Function.update_of_ne hx, div_eq_mul_inv]

Goal state after:
Module: Mathlib.NumberTheory.FLT.Basic

Goal state before:
pp: n : ℕ
R : Type u_2
inst✝³ : CommSemiring R
inst✝² : IsDomain R
inst✝¹ : DecidableEq R
inst✝ : NormalizedGCDMonoid R
hn : ∀ (a b c : R), a ≠ 0 → b ≠ 0 → c ≠ 0 → {a, b, c}.gcd id = 1 → a ^ n + b ^ n ≠ c ^ n
a b c : R
ha : a ≠ 0
hb : b ≠ 0
hc : c ≠ 0
habc : a ^ n + b ^ n = c ^ n
⊢ False

Tactic:
let s : Finset R := {a, b, c}

Goal state after:
n : ℕ
R : Type u_2
inst✝³ : CommSemiring R
inst✝² : IsDomain R
inst✝¹ : DecidableEq R
inst✝ : NormalizedGCDMonoid R
hn : ∀ (a b c : R), a ≠ 0 → b ≠ 0 → c ≠ 0 → {a, b, c}.gcd id = 1 → a ^ n + b ^ n ≠ c ^ n
a b c : R
ha : a ≠ 0
hb : b ≠ 0
hc : c ≠ 0
habc : a ^ n + b ^ n = c ^ n
s : Finset R := {a, b, c}
⊢ False
Module: Mathlib.NumberTheory.FLT.Basic

Goal state before:
pp: case inr
n : ℕ
p : ℤ
hp : Prime p
a b c : ℤ
hpa : p ∣ a
hpb : p ∣ b
HF : a ^ n + b ^ n + c ^ n = 0
hn : n ≠ 0
⊢ p ∣ c

Tactic:
refine hp.dvd_of_dvd_pow (n := n) (dvd_neg.1 ?_)

Goal state after:
case inr
n : ℕ
p : ℤ
hp : Prime p
a b c : ℤ
hpa : p ∣ a
hpb : p ∣ b
HF : a ^ n + b ^ n + c ^ n = 0
hn : n ≠ 0
⊢ p ∣ -c ^ n
Module: Mathlib.NumberTheory.FLT.Four

Goal state before:
pp: a b c : ℤ
h : Minimal a b c
ha2 : a % 2 = 1
hc : 0 < c
ht : PythagoreanTriple (a ^ 2) (b ^ 2) c
h2 : (a ^ 2).gcd (b ^ 2) = 1
ha22 : a ^ 2 % 2 = 1
m n : ℤ
ht1 : a ^ 2 = m ^ 2 - n ^ 2
ht2 : b ^ 2 = 2 * m * n
ht3 : c = m ^ 2 + n ^ 2
ht4 : m.gcd n = 1
ht5 : m % 2 = 0 ∧ n % 2 = 1 ∨ m % 2 = 1 ∧ n % 2 = 0
ht6 : 0 ≤ m
htt : PythagoreanTriple a n m
h3 : a.gcd n = 1
hb20 : b ^ 2 ≠ 0
⊢ 0 < m

Tactic:
apply lt_of_le_of_ne ht6

Goal state after:
a b c : ℤ
h : Minimal a b c
ha2 : a % 2 = 1
hc : 0 < c
ht : PythagoreanTriple (a ^ 2) (b ^ 2) c
h2 : (a ^ 2).gcd (b ^ 2) = 1
ha22 : a ^ 2 % 2 = 1
m n : ℤ
ht1 : a ^ 2 = m ^ 2 - n ^ 2
ht2 : b ^ 2 = 2 * m * n
ht3 : c = m ^ 2 + n ^ 2
ht4 : m.gcd n = 1
ht5 : m % 2 = 0 ∧ n % 2 = 1 ∨ m % 2 = 1 ∧ n % 2 = 0
ht6 : 0 ≤ m
htt : PythagoreanTriple a n m
h3 : a.gcd n = 1
hb20 : b ^ 2 ≠ 0
⊢ 0 ≠ m
Module: Mathlib.NumberTheory.FLT.Four

Goal state before:
pp: a b c : ℤ
h : Minimal a b c
ha2 : a % 2 = 1
hc : 0 < c
ht : PythagoreanTriple (a ^ 2) (b ^ 2) c
h2 : (a ^ 2).gcd (b ^ 2) = 1
ha22 : a ^ 2 % 2 = 1
m n : ℤ
ht1 : a ^ 2 = m ^ 2 - n ^ 2
ht2 : b ^ 2 = 2 * m * n
ht3 : c = m ^ 2 + n ^ 2
ht4 : m.gcd n = 1
ht5 : m % 2 = 0 ∧ n % 2 = 1 ∨ m % 2 = 1 ∧ n % 2 = 0
ht6 : 0 ≤ m
htt : PythagoreanTriple a n m
h3 : a.gcd n = 1
hb20 : b ^ 2 ≠ 0
h4 : 0 < m
r s : ℤ
left✝ : a = r ^ 2 - s ^ 2
htt2 : n = 2 * r * s
htt3 : m = r ^ 2 + s ^ 2
htt4 : r.gcd s = 1
htt5 : r % 2 = 0 ∧ s % 2 = 1 ∨ r % 2 = 1 ∧ s % 2 = 0
htt6 : 0 ≤ r
hcp : m.gcd (r * s) = 1
b' : ℤ
hb2' : b = 2 * b'
⊢ 4 * b' ^ 2 = 4 * (m * (r * s))

Tactic:
linear_combination (-b - 2 * b') * hb2' + ht2 + 2 * m * htt2

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

Goal state before:
pp: case left
R : Type u_1
inst✝¹ : CommRing R
inst✝ : NoZeroDivisors R
a b : R[X]
hc : IsCoprime a b
hw : a * derivative b = derivative a * b
⊢ a ∣ derivative a * b

Tactic:
rw [← hw]

Goal state after:
case left
R : Type u_1
inst✝¹ : CommRing R
inst✝ : NoZeroDivisors R
a b : R[X]
hc : IsCoprime a b
hw : a * derivative b = derivative a * b
⊢ a ∣ a * derivative b
Module: Mathlib.NumberTheory.PythagoreanTriples

Goal state before:
pp: m n : ℤ
h : m.gcd n = 1
hm : m % 2 = 0
hn : n % 2 = 1
H : ¬(m ^ 2 - n ^ 2).gcd (2 * m * n) = 1
p : ℕ
hp : Nat.Prime p
hp1 : ↑p ∣ m ^ 2 - n ^ 2
hp2 : ↑p ∣ 2 * m * n
⊢ False

Tactic:
have hnp : ¬(p : ℤ) ∣ Int.gcd m n := by
    rw [h]
    norm_cast
    exact mt Nat.dvd_one.mp (Nat.Prime.ne_one hp)

Goal state after:
m n : ℤ
h : m.gcd n = 1
hm : m % 2 = 0
hn : n % 2 = 1
H : ¬(m ^ 2 - n ^ 2).gcd (2 * m * n) = 1
p : ℕ
hp : Nat.Prime p
hp1 : ↑p ∣ m ^ 2 - n ^ 2
hp2 : ↑p ∣ 2 * m * n
hnp : ¬↑p ∣ ↑(m.gcd n)
⊢ False
Module: Mathlib.RingTheory.Radical.Basic

Goal state before:
pp: M : Type u_1
inst✝² : CommMonoidWithZero M
inst✝¹ : NormalizationMonoid M
inst✝ : UniqueFactorizationMonoid M
a : M
n : ℕ
hn : n ≠ 0
⊢ primeFactors (a ^ n) = primeFactors a

Tactic:
simp_rw [primeFactors, normalizedFactors_pow, Multiset.toFinset_nsmul _ _ hn]

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

Goal state before:
pp: case hpr
k : Type u_1
inst✝¹ : Field k
inst✝ : DecidableEq k
p✝ : k[X]
i✝ : ℕ
a✝ : Prime p✝
⊢ divRadical (p✝ ^ i✝) ∣ derivative (p✝ ^ i✝)

Tactic:
case hpr p i hp =>
    cases i
    · rw [pow_zero, derivative_one]
      apply dvd_zero
    · case succ i =>
      rw [← mul_dvd_mul_iff_left radical_ne_zero, radical_mul_divRadical,
        radical_pow_of_prime hp i.succ_ne_zero, derivative_pow_succ, ← mul_assoc]
      apply dvd_mul_of_dvd_left
      rw [mul_comm, mul_assoc]
      apply dvd_mul_of_dvd_right
      rw [pow_succ, mul_dvd_mul_iff_left (pow_ne_zero i hp.ne_zero), dvd_normalize_iff]

Goal state after:
Module: Mathlib.NumberTheory.PythagoreanTriples

Goal state before:
pp: m n : ℤ
h : m.gcd n = 1
hm : m % 2 = 1
hn : n % 2 = 0
⊢ (n ^ 2 - m ^ 2).natAbs.gcd (2 * n * m).natAbs = 1

Tactic:
apply coprime_sq_sub_mul_of_even_odd _ hn hm

Goal state after:
m n : ℤ
h : m.gcd n = 1
hm : m % 2 = 1
hn : n % 2 = 0
⊢ n.gcd m = 1
Module: Mathlib.NumberTheory.FLT.Four

Goal state before:
pp: ⊢ FermatLastTheoremFor 4

Tactic:
rw [fermatLastTheoremFor_iff_int]
  intro a b c ha hb _ heq
  apply @not_fermat_42 _ _ (c ^ 2) ha hb
  rw [heq]; ring

Goal state after:
Module: Mathlib.NumberTheory.PythagoreanTriples

Goal state before:
pp: case neg
x y z : ℤ
h : PythagoreanTriple x y z
hc : x.gcd y = 1
hyo : y % 2 = 1
hzpos : 0 < z
h0 : ¬x = 0
v : ℚ := ↑x / ↑z
w : ℚ := ↑y / ↑z
hq : v ^ 2 + w ^ 2 = 1
hvz : v ≠ 0
hw1 : w ≠ -1
hQ : ∀ (x : ℚ), 1 + x ^ 2 ≠ 0
hp : (v, w) ∈ {p | p.1 ^ 2 + p.2 ^ 2 = 1 ∧ p.2 ≠ -1}
q : ℚ := (circleEquivGen hQ).symm ⟨(v, w), hp⟩
ht4 : v = 2 * q / (1 + q ^ 2) ∧ w = (1 - q ^ 2) / (1 + q ^ 2)
m : ℤ := ↑q.den
n : ℤ := q.num
hm0 : m ≠ 0
hq2 : q = ↑n / ↑m
hm2n2 : 0 < m ^ 2 + n ^ 2
hm2n20 : ↑m ^ 2 + ↑n ^ 2 ≠ 0
hw2 : w = (↑m ^ 2 - ↑n ^ 2) / (↑m ^ 2 + ↑n ^ 2)
hv2 : v = 2 * ↑m * ↑n / (↑m ^ 2 + ↑n ^ 2)
hnmcp : n.gcd m = 1
hmncp : m.gcd n = 1
⊢ h.IsPrimitiveClassified

Tactic:
rcases Int.emod_two_eq_zero_or_one m with hm2 | hm2

Goal state after:
case neg.inl
x y z : ℤ
h : PythagoreanTriple x y z
hc : x.gcd y = 1
hyo : y % 2 = 1
hzpos : 0 < z
h0 : ¬x = 0
v : ℚ := ↑x / ↑z
w : ℚ := ↑y / ↑z
hq : v ^ 2 + w ^ 2 = 1
hvz : v ≠ 0
hw1 : w ≠ -1
hQ : ∀ (x : ℚ), 1 + x ^ 2 ≠ 0
hp : (v, w) ∈ {p | p.1 ^ 2 + p.2 ^ 2 = 1 ∧ p.2 ≠ -1}
q : ℚ := (circleEquivGen hQ).symm ⟨(v, w), hp⟩
ht4 : v = 2 * q / (1 + q ^ 2) ∧ w = (1 - q ^ 2) / (1 + q ^ 2)
m : ℤ := ↑q.den
n : ℤ := q.num
hm0 : m ≠ 0
hq2 : q = ↑n / ↑m
hm2n2 : 0 < m ^ 2 + n ^ 2
hm2n20 : ↑m ^ 2 + ↑n ^ 2 ≠ 0
hw2 : w = (↑m ^ 2 - ↑n ^ 2) / (↑m ^ 2 + ↑n ^ 2)
hv2 : v = 2 * ↑m * ↑n / (↑m ^ 2 + ↑n ^ 2)
hnmcp : n.gcd m = 1
hmncp : m.gcd n = 1
hm2 : m % 2 = 0
⊢ h.IsPrimitiveClassified

case neg.inr
x y z : ℤ
h : PythagoreanTriple x y z
hc : x.gcd y = 1
hyo : y % 2 = 1
hzpos : 0 < z
h0 : ¬x = 0
v : ℚ := ↑x / ↑z
w : ℚ := ↑y / ↑z
hq : v ^ 2 + w ^ 2 = 1
hvz : v ≠ 0
hw1 : w ≠ -1
hQ : ∀ (x : ℚ), 1 + x ^ 2 ≠ 0
hp : (v, w) ∈ {p | p.1 ^ 2 + p.2 ^ 2 = 1 ∧ p.2 ≠ -1}
q : ℚ := (circleEquivGen hQ).symm ⟨(v, w), hp⟩
ht4 : v = 2 * q / (1 + q ^ 2) ∧ w = (1 - q ^ 2) / (1 + q ^ 2)
m : ℤ := ↑q.den
n : ℤ := q.num
hm0 : m ≠ 0
hq2 : q = ↑n / ↑m
hm2n2 : 0 < m ^ 2 + n ^ 2
hm2n20 : ↑m ^ 2 + ↑n ^ 2 ≠ 0
hw2 : w = (↑m ^ 2 - ↑n ^ 2) / (↑m ^ 2 + ↑n ^ 2)
hv2 : v = 2 * ↑m * ↑n / (↑m ^ 2 + ↑n ^ 2)
hnmcp : n.gcd m = 1
hmncp : m.gcd n = 1
hm2 : m % 2 = 1
⊢ h.IsPrimitiveClassified
Module: Mathlib.RingTheory.FractionalIdeal.Norm

Goal state before:
pp: R : Type u_1
inst✝⁶ : CommRing R
inst✝⁵ : IsDedekindDomain R
inst✝⁴ : Free ℤ R
inst✝³ : Module.Finite ℤ R
K : Type u_2
inst✝² : CommRing K
inst✝¹ : Algebra R K
inst✝ : IsFractionRing R K
⊢ ↑(Ideal.absNorm (num 0)) / ↑|(Algebra.norm ℤ) ↑(den 0)| = 0

Tactic:
rw [num_zero_eq, Submodule.zero_eq_bot, Ideal.absNorm_bot, Nat.cast_zero, zero_div]
    exact IsFractionRing.injective R K

Goal state after:
Module: Mathlib.NumberTheory.FLT.Polynomial

Goal state before:
pp: case inl
k : Type u_1
inst✝ : Field k
p q r : ℕ
hp : p ≠ 0
hq : q ≠ 0
hr : r ≠ 0
hineq : q * r + r * p + p * q ≤ p * q * r
chp : ↑p ≠ 0
chq : ↑q ≠ 0
chr : ↑r ≠ 0
a b c : k[X]
ha : a ≠ 0
hb : b ≠ 0
hc : c ≠ 0
hab : IsCoprime a b
u v w : k
hu : u ≠ 0
hv : v ≠ 0
hw : w ≠ 0
heq : C u * a ^ p + C v * b ^ q + C w * c ^ r = 0
hbc : IsCoprime b c
hca : IsCoprime c a
hCu : C u ≠ 0
hCv : C v ≠ 0
hCw : C w ≠ 0
hap : a ^ p ≠ 0
hbq : b ^ q ≠ 0
hcr : c ^ r ≠ 0
habp : IsCoprime (C u * a ^ p) (C v * b ^ q)
hbcp : IsCoprime (C v * b ^ q) (C w * c ^ r)
hcap : IsCoprime (C w * c ^ r) (C u * a ^ p)
habcp : IsCoprime (C u * a ^ p * (C v * b ^ q)) (C w * c ^ r)
nd_lt :
  p * a.natDegree + 1 ≤ (radical (a * b) * radical c).natDegree ∧
    q * b.natDegree + 1 ≤ (radical (a * b) * radical c).natDegree ∧
      r * c.natDegree + 1 ≤ (radical (a * b) * radical c).natDegree
⊢ derivative a = 0 ∧ derivative b = 0 ∧ derivative c = 0

Tactic:
← radical_mul (hca.symm.mul_left hbc).isRelPrime

Goal state after:
case inl
k : Type u_1
inst✝ : Field k
p q r : ℕ
hp : p ≠ 0
hq : q ≠ 0
hr : r ≠ 0
hineq : q * r + r * p + p * q ≤ p * q * r
chp : ↑p ≠ 0
chq : ↑q ≠ 0
chr : ↑r ≠ 0
a b c : k[X]
ha : a ≠ 0
hb : b ≠ 0
hc : c ≠ 0
hab : IsCoprime a b
u v w : k
hu : u ≠ 0
hv : v ≠ 0
hw : w ≠ 0
heq : C u * a ^ p + C v * b ^ q + C w * c ^ r = 0
hbc : IsCoprime b c
hca : IsCoprime c a
hCu : C u ≠ 0
hCv : C v ≠ 0
hCw : C w ≠ 0
hap : a ^ p ≠ 0
hbq : b ^ q ≠ 0
hcr : c ^ r ≠ 0
habp : IsCoprime (C u * a ^ p) (C v * b ^ q)
hbcp : IsCoprime (C v * b ^ q) (C w * c ^ r)
hcap : IsCoprime (C w * c ^ r) (C u * a ^ p)
habcp : IsCoprime (C u * a ^ p * (C v * b ^ q)) (C w * c ^ r)
nd_lt :
  p * a.natDegree + 1 ≤ (radical (a * b * c)).natDegree ∧
    q * b.natDegree + 1 ≤ (radical (a * b * c)).natDegree ∧ r * c.natDegree + 1 ≤ (radical (a * b * c)).natDegree
⊢ derivative a = 0 ∧ derivative b = 0 ∧ derivative c = 0
Module: Mathlib.NumberTheory.FLT.Polynomial

Goal state before:
pp: case inr
k : Type u_1
inst✝ : Field k
p q r : ℕ
hp : p ≠ 0
hq : q ≠ 0
hr : r ≠ 0
hineq : q * r + r * p + p * q ≤ p * q * r
chp : ↑p ≠ 0
chq : ↑q ≠ 0
chr : ↑r ≠ 0
a b c : k[X]
ha : a ≠ 0
hb : b ≠ 0
hc : c ≠ 0
hab : IsCoprime a b
u v w : k
hu : u ≠ 0
hv : v ≠ 0
hw : w ≠ 0
heq : C u * a ^ p + C v * b ^ q + C w * c ^ r = 0
hbc : IsCoprime b c
hca : IsCoprime c a
hCu : C u ≠ 0
hCv : C v ≠ 0
hCw : C w ≠ 0
hap : a ^ p ≠ 0
hbq : b ^ q ≠ 0
hcr : c ^ r ≠ 0
habp : IsCoprime (C u * a ^ p) (C v * b ^ q)
hbcp : IsCoprime (C v * b ^ q) (C w * c ^ r)
hcap : IsCoprime (C w * c ^ r) (C u * a ^ p)
habcp : IsCoprime (C u * a ^ p * (C v * b ^ q)) (C w * c ^ r)
dr0 : derivative a = 0 ∧ derivative (b ^ q) = 0 ∧ derivative (c ^ r) = 0
⊢ derivative a = 0 ∧ derivative b = 0 ∧ derivative c = 0

Tactic:
derivative_pow_eq_zero chq,

Goal state after:
case inr
k : Type u_1
inst✝ : Field k
p q r : ℕ
hp : p ≠ 0
hq : q ≠ 0
hr : r ≠ 0
hineq : q * r + r * p + p * q ≤ p * q * r
chp : ↑p ≠ 0
chq : ↑q ≠ 0
chr : ↑r ≠ 0
a b c : k[X]
ha : a ≠ 0
hb : b ≠ 0
hc : c ≠ 0
hab : IsCoprime a b
u v w : k
hu : u ≠ 0
hv : v ≠ 0
hw : w ≠ 0
heq : C u * a ^ p + C v * b ^ q + C w * c ^ r = 0
hbc : IsCoprime b c
hca : IsCoprime c a
hCu : C u ≠ 0
hCv : C v ≠ 0
hCw : C w ≠ 0
hap : a ^ p ≠ 0
hbq : b ^ q ≠ 0
hcr : c ^ r ≠ 0
habp : IsCoprime (C u * a ^ p) (C v * b ^ q)
hbcp : IsCoprime (C v * b ^ q) (C w * c ^ r)
hcap : IsCoprime (C w * c ^ r) (C u * a ^ p)
habcp : IsCoprime (C u * a ^ p * (C v * b ^ q)) (C w * c ^ r)
dr0 : derivative a = 0 ∧ derivative b = 0 ∧ derivative (c ^ r) = 0
⊢ derivative a = 0 ∧ derivative b = 0 ∧ derivative c = 0
Module: Mathlib.NumberTheory.NumberField.InfinitePlace.Basic

Goal state before:
pp: K : Type u_1
inst✝ : Field K
w : InfinitePlace K
⊢ w.IsReal ↔ ComplexEmbedding.IsReal w.embedding

Tactic:
refine ⟨?_, fun h => ⟨embedding w, h, mk_embedding w⟩⟩
  rintro ⟨φ, ⟨hφ, rfl⟩⟩
  rwa [embedding_mk_eq_of_isReal hφ]

Goal state after:
Module: Mathlib.NumberTheory.NumberField.Units.Basic

Goal state before:
pp: case refine_1
K : Type u_1
inst✝¹ : Field K
inst✝ : NumberField K
a : K
x✝ : a ∈ (fun x ↦ (algebraMap (𝓞 K) K) ↑x) '' ↑(torsion K)
u : (𝓞 K)ˣ
h_tors : u ∈ ↑(torsion K)
h_ua : (fun x ↦ (algebraMap (𝓞 K) K) ↑x) u = a
⊢ IsIntegral ℤ a

Tactic:
rw [← h_ua]
    exact u.val.prop

Goal state after:
Module: Mathlib.NumberTheory.PythagoreanTriples

Goal state before:
pp: x y z : ℤ
⊢ PythagoreanTriple x y z ↔
    ∃ k m n,
      (x = k * (m ^ 2 - n ^ 2) ∧ y = k * (2 * m * n) ∨ x = k * (2 * m * n) ∧ y = k * (m ^ 2 - n ^ 2)) ∧
        (z = k * (m ^ 2 + n ^ 2) ∨ z = -k * (m ^ 2 + n ^ 2))

Tactic:
by
  constructor
  · intro h
    obtain ⟨k, m, n, H⟩ := h.classified
    use k, m, n
    rcases H with (⟨rfl, rfl⟩ | ⟨rfl, rfl⟩)
    · refine ⟨Or.inl ⟨rfl, rfl⟩, ?_⟩
      have : z ^ 2 = (k * (m ^ 2 + n ^ 2)) ^ 2 := by
        rw [sq, ← h.eq]
        ring
      simpa using eq_or_eq_neg_of_sq_eq_sq _ _ this
    · refine ⟨Or.inr ⟨rfl, rfl⟩, ?_⟩
      have : z ^ 2 = (k * (m ^ 2 + n ^ 2)) ^ 2 := by
        rw [sq, ← h.eq]
        ring
      simpa using eq_or_eq_neg_of_sq_eq_sq _ _ this
  · rintro ⟨k, m, n, ⟨rfl, rfl⟩ | ⟨rfl, rfl⟩, rfl | rfl⟩ <;> delta PythagoreanTriple <;> ring

Goal state after: