mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.Geometry.Euclidean.Inversion.ImageHyperplane

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
c x y : P
R : ℝ
hR : R ≠ 0
hx : x ≠ c
hy : y ≠ c
⊢ inversion c R x ∈ perpBisector c (inversion c R y) ↔ dist x y = dist y c

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Inversion.ImageHyperplane

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
c x y : P
R : ℝ
hR : R ≠ 0
hy : y ≠ c
⊢ inversion c R x ∈ perpBisector c (inversion c R y) ↔ dist x y = dist y c ∧ x ≠ c

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ line[ℝ, t.points i₂, t.points i₃].SSameSide (Simplex.incenter t) (t.points i₁)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Inversion.ImageHyperplane

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
c y : P
R : ℝ
hR : R ≠ 0
hy : y ≠ c
⊢ inversion c R ⁻¹' ↑(perpBisector c y) = sphere (inversion c R y) (R ^ 2 / dist y c) \ {c}

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ line[ℝ, t.points i₂, t.points i₃].SSameSide (t.points i₁) (Simplex.incenter t)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Circumcenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
n : ℕ
s : Simplex ℝ P n
p p₁ p₂ : P
r : ℝ
h₁ : ∀ (i : Fin (n + 1)), dist (s.points i) p₁ = r
h₂ : ∀ (i : Fin (n + 1)), dist (s.points i) p₂ = r
span_s : AffineSubspace ℝ P := affineSpan ℝ (Set.range s.points)
h₁' : ↑(s.orthogonalProjectionSpan p₁) = s.circumcenter
h₂' : ↑(s.orthogonalProjectionSpan p₂) = s.circumcenter
r₁ r₂ : ℝ
hp₁o : ↑(s.orthogonalProjectionSpan p₁) ∈ affineSpan ℝ (Set.range s.points)
hp₁ : p₁ = r₁ • (p -ᵥ ↑((orthogonalProjection (affineSpan ℝ (Set.range s.points))) p)) +ᵥ s.circumcenter
hp₂o : ↑(s.orthogonalProjectionSpan p₂) ∈ affineSpan ℝ (Set.range s.points)
hp₂ : p₂ = r₂ • (p -ᵥ ↑((orthogonalProjection (affineSpan ℝ (Set.range s.points))) p)) +ᵥ s.circumcenter
h : s.points 0 ∈ span_s
hd₁ :
  r₁ * r₁ *
      ⟪p -ᵥ ↑((orthogonalProjection (affineSpan ℝ (Set.range s.points))) p),
        p -ᵥ ↑((orthogonalProjection (affineSpan ℝ (Set.range s.points))) p)⟫ =
    r₂ * r₂ *
      ⟪p -ᵥ ↑((orthogonalProjection (affineSpan ℝ (Set.range s.points))) p),
        p -ᵥ ↑((orthogonalProjection (affineSpan ℝ (Set.range s.points))) p)⟫
hd₂ : dist p₂ s.circumcenter * dist p₂ s.circumcenter = r * r - s.circumradius * s.circumradius
hp : ¬p = ↑(s.orthogonalProjectionSpan p)
⊢ ⟪p -ᵥ ↑((orthogonalProjection span_s) p), p -ᵥ ↑((orthogonalProjection span_s) p)⟫ ≠ 0

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Inversion.ImageHyperplane

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
c y : P
R : ℝ
hR : R ≠ 0
hy : y ≠ c
⊢ inversion c R '' ↑(perpBisector c y) = sphere (inversion c R y) (R ^ 2 / dist y c) \ {c}

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ line[ℝ, t.points i₂, t.points i₃].SOppSide (Simplex.excenter t {i₁}) (t.points i₁)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ line[ℝ, t.points i₂, t.points i₃].SOppSide (t.points i₁) (Simplex.excenter t {i₁})

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ line[ℝ, t.points i₂, t.points i₃].SSameSide (Simplex.excenter t {i₂}) (t.points i₁)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Inversion.Calculus

Goal state before:
pp: F : Type u_2
inst✝¹ : NormedAddCommGroup F
inst✝ : InnerProductSpace ℝ F
c : F
R : ℝ
x : F
hx : (fun x ↦ c + x) x ≠ c
this :
  HasFDerivAt (inversion c R)
    ((R ^ 2 * ((fun y ↦ y⁻¹) ∘ fun x ↦ ‖_root_.id x - c‖ ^ 2) (c + x)) • ContinuousLinearMap.id ℝ F +
      (R ^ 2 •
            -((‖_root_.id (c + x) - c‖ ^ 2) ^ 2)⁻¹ •
              2 • (innerSL ℝ) (_root_.id (c + x) - c) ∘SL ContinuousLinearMap.id ℝ F).smulRight
        (_root_.id (c + x) - c))
    (c + x)
⊢ ((‖x‖ ^ 2) ^ 2)⁻¹ * ‖x‖ ^ 2 = (‖x‖ ^ 2)⁻¹

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ line[ℝ, t.points i₂, t.points i₃].SSameSide (t.points i₁) (Simplex.excenter t {i₂})

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝⁴ : NormedAddCommGroup V
inst✝³ : InnerProductSpace ℝ V
inst✝² : MetricSpace P
inst✝¹ : NormedAddTorsor V P
t : Triangle ℝ P
inst✝ : Fact (Module.finrank ℝ V = 2)
signs : Finset (Fin 3)
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ {i₁}ᶜ = {i₂, i₃}

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Inversion.ImageHyperplane

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
c y : P
R : ℝ
hR : R ≠ 0
hy : y ≠ c
⊢ inversion c R ⁻¹' sphere y (dist y c) = insert c ↑(perpBisector c (inversion c R y))

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝⁴ : NormedAddCommGroup V
inst✝³ : InnerProductSpace ℝ V
inst✝² : MetricSpace P
inst✝¹ : NormedAddTorsor V P
t : Triangle ℝ P
inst✝ : Fact (Module.finrank ℝ V = 2)
signs : Finset (Fin 3)
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ line[ℝ, t.points i₂, t.points i₃] = (Simplex.exsphere t signs).orthRadius (Simplex.touchpoint t signs i₁)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Inversion.ImageHyperplane

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
c y : P
R : ℝ
hR : R ≠ 0
hy : y ≠ c
⊢ inversion c R '' sphere y (dist y c) = insert c ↑(perpBisector c (inversion c R y))

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ Sbtw ℝ (t.points i₁) (Simplex.touchpoint t ∅ i₂) (t.points i₃)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Inversion.Calculus

Goal state before:
pp: F : Type u_2
inst✝¹ : NormedAddCommGroup F
inst✝ : InnerProductSpace ℝ F
c x : F
R : ℝ
hx : x ≠ c
⊢ HasFDerivAt (inversion c R) ((R / dist x c) ^ 2 • ↑↑(ℝ ∙ (x - c))ᗮ.reflection) x

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ Sbtw ℝ (t.points i₁) (Simplex.touchpoint t {i₂} i₂) (t.points i₃)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
hw : ∑ j, Simplex.touchpointWeights t {i₁} i₂ j = 1
⊢ Finset.univ = {i₁, i₂, i₃}

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
hw : Simplex.touchpointWeights t {i₁} i₂ i₁ + Simplex.touchpointWeights t {i₁} i₂ i₃ = 1
i : Fin (2 + 1)
⊢ i = i₁ ∨ i = i₂ ∨ i = i₃

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
hw : Simplex.touchpointWeights t {i₁} i₂ i₁ + Simplex.touchpointWeights t {i₁} i₂ i₃ = 1
⊢ Simplex.touchpointWeights t {i₁} i₂ =
    Finset.affineCombinationLineMapWeights i₁ i₃ (Simplex.touchpointWeights t {i₁} i₂ i₃)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Incenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
t : Triangle ℝ P
i₁ i₂ i₃ : Fin 3
h₁₂ : i₁ ≠ i₂
h₁₃ : i₁ ≠ i₃
h₂₃ : i₂ ≠ i₃
⊢ Sbtw ℝ (Simplex.touchpoint t {i₁} i₂) (t.points i₃) (t.points i₁)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.Circumcenter

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
n : ℕ
s : Simplex ℝ P n
p p₁ p₂ : P
r : ℝ
hp₁ : p₁ ∈ affineSpan ℝ (insert p (Set.range s.points))
hp₂ : p₂ ∈ affineSpan ℝ (insert p (Set.range s.points))
h₁ : ∀ (i : Fin (n + 1)), dist (s.points i) p₁ = r
h₂ : ∀ (i : Fin (n + 1)), dist (s.points i) p₂ = r
⊢ p₁ = p₂ ∨ p₁ = (reflection (affineSpan ℝ (Set.range s.points))) p₂

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
n : ℕ
s : Simplex ℝ P n
⊢ s.ninePointCircle.center ∈ affineSpan ℝ (Set.range s.points)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
m n : ℕ
s : Simplex ℝ P n
e : Fin (n + 1) ≃ Fin (m + 1)
⊢ n = m

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
m n : ℕ
s : Simplex ℝ P n
e : Fin (n + 1) ≃ Fin (m + 1)
⊢ (s.reindex e).ninePointCircle = s.ninePointCircle

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝⁷ : NormedAddCommGroup V
inst✝⁶ : InnerProductSpace ℝ V
inst✝⁵ : MetricSpace P
inst✝⁴ : NormedAddTorsor V P
V₂ : Type u_3
P₂ : Type u_4
inst✝³ : NormedAddCommGroup V₂
inst✝² : InnerProductSpace ℝ V₂
inst✝¹ : MetricSpace P₂
inst✝ : NormedAddTorsor V₂ P₂
n : ℕ
s : Simplex ℝ P n
f : P →ᵃⁱ[ℝ] P₂
⊢ (s.map f.toAffineMap ⋯).ninePointCircle = { center := f s.ninePointCircle.center, radius := s.ninePointCircle.radius }

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
n : ℕ
s : Simplex ℝ P n
S : AffineSubspace ℝ P
hS : affineSpan ℝ (Set.range s.points) ≤ S
⊢ (s.restrict S hS).ninePointCircle = { center := ⟨s.ninePointCircle.center, ⋯⟩, radius := s.ninePointCircle.radius }

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝⁴ : NormedAddCommGroup V
inst✝³ : InnerProductSpace ℝ V
inst✝² : MetricSpace P
inst✝¹ : NormedAddTorsor V P
n : ℕ
inst✝ : NeZero n
s : Simplex ℝ P n
i : Fin (n + 1)
⊢ ↑n ≠ 0

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝⁴ : NormedAddCommGroup V
inst✝³ : InnerProductSpace ℝ V
inst✝² : MetricSpace P
inst✝¹ : NormedAddTorsor V P
n : ℕ
inst✝ : NeZero n
s : Simplex ℝ P n
i : Fin (n + 1)
⊢ s.faceOppositeCentroid i ∈ s.ninePointCircle

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
v₁ : ι → P₁
v₂ : ι → P₂
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
⊢ Similar v₁ v₂ ↔ ∃ r, r ≠ 0 ∧ Pairwise fun i₁ i₂ ↦ edist (v₁ i₁) (v₁ i₂) = ↑r * edist (v₂ i₁) (v₂ i₂)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
v₁ : ι → P₁
v₂ : ι → P₂
h : v₁ ≅ v₂
i₁ i₂ : ι
⊢ edist (v₁ i₁) (v₁ i₂) = ↑1 * edist (v₂ i₁) (v₂ i₂)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
inst✝ : PseudoEMetricSpace P₁
v₁ : ι → P₁
x✝¹ x✝ : ι
⊢ edist (v₁ x✝¹) (v₁ x✝) = ↑1 * edist (v₁ x✝¹) (v₁ x✝)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
v₁ : ι → P₁
v₂ : ι → P₂
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
h : v₁ ∼ v₂
⊢ v₂ ∼ v₁

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝⁴ : NormedAddCommGroup V
inst✝³ : InnerProductSpace ℝ V
inst✝² : MetricSpace P
inst✝¹ : NormedAddTorsor V P
n : ℕ
inst✝ : NeZero n
s : Simplex ℝ P n
⊢ s.ninePointCircle = s.medial.circumsphere

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
m n : ℕ
s : Simplex ℝ P n
e : Fin (n + 1) ≃ Fin (m + 1)
⊢ (s.reindex e).eulerPoint = s.eulerPoint ∘ ⇑e.symm

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝⁷ : NormedAddCommGroup V
inst✝⁶ : InnerProductSpace ℝ V
inst✝⁵ : MetricSpace P
inst✝⁴ : NormedAddTorsor V P
V₂ : Type u_3
P₂ : Type u_4
inst✝³ : NormedAddCommGroup V₂
inst✝² : InnerProductSpace ℝ V₂
inst✝¹ : MetricSpace P₂
inst✝ : NormedAddTorsor V₂ P₂
n : ℕ
s : Simplex ℝ P n
f : P →ᵃⁱ[ℝ] P₂
i : Fin (n + 1)
⊢ (s.map f.toAffineMap ⋯).eulerPoint i = f (s.eulerPoint i)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
P₃ : Type u_5
v₁ : ι → P₁
v₂ : ι → P₂
v₃ : ι → P₃
inst✝² : PseudoEMetricSpace P₁
inst✝¹ : PseudoEMetricSpace P₂
inst✝ : PseudoEMetricSpace P₃
h₁ : v₁ ∼ v₂
h₂ : v₂ ∼ v₃
⊢ v₁ ∼ v₃

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
n : ℕ
s : Simplex ℝ P n
S : AffineSubspace ℝ P
hS : affineSpan ℝ (Set.range s.points) ≤ S
i : Fin (n + 1)
⊢ ↑((s.restrict S hS).eulerPoint i) = s.eulerPoint i

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
ι' : Type u_2
P₁ : Type u_3
P₂ : Type u_4
v₁ : ι → P₁
v₂ : ι → P₂
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
h : v₁ ∼ v₂
f : ι' → ι
⊢ v₁ ∘ f ∼ v₂ ∘ f

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
ι' : Type u_2
P₁ : Type u_3
P₂ : Type u_4
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
f : ι' ≃ ι
v₁ : ι → P₁
v₂ : ι → P₂
⊢ v₁ ∘ ⇑f ∼ v₂ ∘ ⇑f ↔ v₁ ∼ v₂

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
P₃ : Type u_5
v₁ : ι → P₁
v₂ : ι → P₂
inst✝⁴ : PseudoEMetricSpace P₁
inst✝³ : PseudoEMetricSpace P₂
inst✝² : PseudoEMetricSpace P₃
F : Type u_6
inst✝¹ : FunLike F P₂ P₃
inst✝ : DilationClass F P₂ P₃
f : F
⊢ v₁ ∼ ⇑f ∘ v₂ ↔ v₁ ∼ v₂

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
s : Simplex ℝ P 0
i : Fin (0 + 1)
⊢ Set.range s.points = {s.points i}

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: P₁ : Type u_3
P₂ : Type u_4
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
a b c : P₁
a' b' c' : P₂
h : ![a, b, c] ∼ ![a', b', c']
⊢ ![b, a, c] = ![a, b, c] ∘ ⇑(Equiv.swap 0 1)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
n : ℕ
s : Simplex ℝ P n
i : Fin (n + 1)
hn : ¬n = 0
⊢ ↑n ≠ 0

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
n : ℕ
s : Simplex ℝ P n
i : Fin (n + 1)
⊢ s.points i -ᵥ s.eulerPoint i = ((↑n - 1) / ↑n) • (s.points i -ᵥ s.mongePoint)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: P₁ : Type u_3
P₂ : Type u_4
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
a b c : P₁
a' b' c' : P₂
h : ![a, b, c] ∼ ![a', b', c']
hl : ![b, a, c] = ![a, b, c] ∘ ⇑(Equiv.swap 0 1)
⊢ ![b', a', c'] = ![a', b', c'] ∘ ⇑(Equiv.swap 0 1)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: P₁ : Type u_3
P₂ : Type u_4
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
a b c : P₁
a' b' c' : P₂
h : ![a, b, c] ∼ ![a', b', c']
⊢ ![b, a, c] ∼ ![b', a', c']

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: P₁ : Type u_3
P₂ : Type u_4
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
a b c : P₁
a' b' c' : P₂
h : ![a, b, c] ∼ ![a', b', c']
⊢ ![a, c, b] = ![a, b, c] ∘ ⇑(Equiv.swap 1 2)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: P₁ : Type u_3
P₂ : Type u_4
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
a b c : P₁
a' b' c' : P₂
h : ![a, b, c] ∼ ![a', b', c']
hl : ![a, c, b] = ![a, b, c] ∘ ⇑(Equiv.swap 1 2)
⊢ ![a', c', b'] = ![a', b', c'] ∘ ⇑(Equiv.swap 1 2)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: P₁ : Type u_3
P₂ : Type u_4
inst✝¹ : PseudoEMetricSpace P₁
inst✝ : PseudoEMetricSpace P₂
a b c : P₁
a' b' c' : P₂
h : ![a, b, c] ∼ ![a', b', c']
⊢ ![a, c, b] ∼ ![a', c', b']

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
hn : NeZero 1
s : Simplex ℝ P 1
i : Fin (1 + 1)
this : 2⁻¹ • (s.faceOppositeCentroid i -ᵥ s.centroid) + 2⁻¹ • (s.points i -ᵥ s.centroid) = 0
⊢ ⅟2 • (s.faceOppositeCentroid i -ᵥ s.circumcenter) +
      ⅟2 •
        (((↑1)⁻¹ • (s.points i -ᵥ ((↑(1 + 1) / ↑(1 - 1)) • (s.centroid -ᵥ s.circumcenter) +ᵥ s.circumcenter)) +ᵥ
            (↑(1 + 1) / ↑(1 - 1)) • (s.centroid -ᵥ s.circumcenter) +ᵥ s.circumcenter) -ᵥ
          s.circumcenter) =
    ((↑1 + 1) / ↑1) • (s.centroid -ᵥ s.circumcenter)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
v₁ : ι → P₁
v₂ : ι → P₂
inst✝¹ : PseudoMetricSpace P₁
inst✝ : PseudoMetricSpace P₂
x✝² : ℝ≥0
x✝¹ x✝ : ι
⊢ edist (v₁ x✝¹) (v₁ x✝) = ↑x✝² * edist (v₂ x✝¹) (v₂ x✝) ↔ nndist (v₁ x✝¹) (v₁ x✝) = x✝² * nndist (v₂ x✝¹) (v₂ x✝)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
v₁ : ι → P₁
v₂ : ι → P₂
inst✝¹ : PseudoMetricSpace P₁
inst✝ : PseudoMetricSpace P₂
⊢ Similar v₁ v₂ ↔ ∃ r, r ≠ 0 ∧ Pairwise fun i₁ i₂ ↦ nndist (v₁ i₁) (v₁ i₂) = r * nndist (v₂ i₁) (v₂ i₂)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
v₁ : ι → P₁
v₂ : ι → P₂
inst✝¹ : PseudoMetricSpace P₁
inst✝ : PseudoMetricSpace P₂
x✝² : ℝ≥0
x✝¹ x✝ : ι
⊢ nndist (v₁ x✝¹) (v₁ x✝) = x✝² * nndist (v₂ x✝¹) (v₂ x✝) ↔ dist (v₁ x✝¹) (v₁ x✝) = ↑x✝² * dist (v₂ x✝¹) (v₂ x✝)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
v₁ : ι → P₁
v₂ : ι → P₂
inst✝¹ : PseudoMetricSpace P₁
inst✝ : PseudoMetricSpace P₂
⊢ Similar v₁ v₂ ↔ ∃ r, r ≠ 0 ∧ Pairwise fun i₁ i₂ ↦ dist (v₁ i₁) (v₁ i₂) = ↑r * dist (v₂ i₁) (v₂ i₂)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
v₁ : ι → P₁
v₂ : ι → P₂
inst✝¹ : PseudoMetricSpace P₁
inst✝ : PseudoMetricSpace P₂
⊢ Similar v₁ v₂ ↔ ∃ r, 0 < r ∧ ∀ (i₁ i₂ : ι), dist (v₁ i₁) (v₁ i₂) = r * dist (v₂ i₁) (v₂ i₂)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
hn : NeZero 1
s : Simplex ℝ P 1
i : Fin (1 + 1)
⊢ (↑1)⁻¹ • (s.centroid -ᵥ s.points i) + (s.points i -ᵥ s.centroid) = 0

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: ι : Type u_1
P₁ : Type u_3
P₂ : Type u_4
v₁ : ι → P₁
v₂ : ι → P₂
inst✝¹ : PseudoMetricSpace P₁
inst✝ : PseudoMetricSpace P₂
⊢ Similar v₁ v₂ ↔ ∃ r, 0 < r ∧ Pairwise fun i₁ i₂ ↦ dist (v₁ i₁) (v₁ i₂) = r * dist (v₂ i₁) (v₂ i₂)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.Similarity

Goal state before:
pp: P₁ : Type u_3
P₂ : Type u_4
inst✝¹ : PseudoMetricSpace P₁
inst✝ : PseudoMetricSpace P₂
a b c : P₁
a' b' c' : P₂
h_ne : dist a b ≠ 0
h_ne' : dist a' b' ≠ 0
heq1 : dist a b * dist b' c' = dist b c * dist a' b'
heq2 : dist a b * dist c' a' = dist c a * dist a' b'
r : ℝ := dist a b / dist a' b'
hr : r = dist a b / dist a' b'
⊢ 0 < r

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Euclidean.NinePointCircle

Goal state before:
pp: V : Type u_1
P : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace P
inst✝ : NormedAddTorsor V P
n : ℕ
hn : NeZero n
s : Simplex ℝ P n
i : Fin (n + 1)
hn1 : ¬n = 1
⊢ 1 < n

Tactic:
by

Goal state after: