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Found 103 declarations mentioning EuclideanGeometry.Sphere.radius.

EuclideanGeometry.Sphere.radius 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] (self : EuclideanGeometry.Sphere P) : ℝ
EuclideanGeometry.Sphere.mk_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] (c : P) (r : ℝ) : { center := c, radius := r }.radius = r
EuclideanGeometry.Sphere.cospherical 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] (s : EuclideanGeometry.Sphere P) : EuclideanGeometry.Cospherical (Metric.sphere s.center s.radius)
EuclideanGeometry.Sphere.mk_center_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] (s : EuclideanGeometry.Sphere P) : { center := s.center, radius := s.radius } = s
EuclideanGeometry.Sphere.radius_nonneg_of_mem 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {s : EuclideanGeometry.Sphere P} {p : P} (h : p ∈ s) : 0 ≤ s.radius
EuclideanGeometry.Sphere.center_mem_iff 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {s : EuclideanGeometry.Sphere P} : s.center ∈ s ↔ s.radius = 0
EuclideanGeometry.Sphere.ext 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} {inst✝ : MetricSpace P} {x y : EuclideanGeometry.Sphere P} (center : x.center = y.center) (radius : x.radius = y.radius) : x = y
EuclideanGeometry.cospherical_iff_exists_sphere 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {ps : Set P} : EuclideanGeometry.Cospherical ps ↔ ∃ s, ps ⊆ Metric.sphere s.center s.radius
EuclideanGeometry.mem_sphere 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {p : P} {s : EuclideanGeometry.Sphere P} : p ∈ s ↔ dist p s.center = s.radius
EuclideanGeometry.mem_sphere' 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {p : P} {s : EuclideanGeometry.Sphere P} : p ∈ s ↔ dist s.center p = s.radius
EuclideanGeometry.Sphere.coe_mk 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] (c : P) (r : ℝ) : Metric.sphere { center := c, radius := r }.center { center := c, radius := r }.radius = Metric.sphere c r
EuclideanGeometry.Sphere.mem_coe' 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {p : P} {s : EuclideanGeometry.Sphere P} : dist p s.center = s.radius ↔ p ∈ s
EuclideanGeometry.Sphere.ext_iff 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} {inst✝ : MetricSpace P} {x y : EuclideanGeometry.Sphere P} : x = y ↔ x.center = y.center ∧ x.radius = y.radius
EuclideanGeometry.Sphere.ne_iff 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {s₁ s₂ : EuclideanGeometry.Sphere P} : s₁ ≠ s₂ ↔ s₁.center ≠ s₂.center ∨ s₁.radius ≠ s₂.radius
EuclideanGeometry.Sphere.mem_coe 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {p : P} {s : EuclideanGeometry.Sphere P} : p ∈ Metric.sphere s.center s.radius ↔ p ∈ s
EuclideanGeometry.subset_sphere 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {ps : Set P} {s : EuclideanGeometry.Sphere P} : ps ⊆ Metric.sphere s.center s.radius ↔ ∀ p ∈ ps, p ∈ s
EuclideanGeometry.dist_of_mem_subset_sphere 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {p : P} {ps : Set P} {s : EuclideanGeometry.Sphere P} (hp : p ∈ ps) (hps : ps ⊆ Metric.sphere s.center s.radius) : dist p s.center = s.radius
EuclideanGeometry.Sphere.IsDiameter.left_eq_right_iff 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [NormedSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (h : s.IsDiameter p₁ p₂) : p₁ = p₂ ↔ s.radius = 0
EuclideanGeometry.Sphere.IsDiameter.left_ne_right_iff_radius_ne_zero 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [NormedSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (h : s.IsDiameter p₁ p₂) : p₁ ≠ p₂ ↔ s.radius ≠ 0
EuclideanGeometry.dist_of_mem_subset_mk_sphere 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{P : Type u_2} [MetricSpace P] {p c : P} {ps : Set P} {r : ℝ} (hp : p ∈ ps) (hps : ps ⊆ Metric.sphere { center := c, radius := r }.center { center := c, radius := r }.radius) : dist p c = r
EuclideanGeometry.Sphere.IsDiameter.left_ne_right_iff_radius_pos 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [NormedSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (h : s.IsDiameter p₁ p₂) : p₁ ≠ p₂ ↔ 0 < s.radius
EuclideanGeometry.Sphere.nonempty_iff 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [NormedSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [Nontrivial V] {s : EuclideanGeometry.Sphere P} : (Metric.sphere s.center s.radius).Nonempty ↔ 0 ≤ s.radius
EuclideanGeometry.norm_vsub_center_eq_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p : P} (hp : p ∈ s) : ‖p -ᵥ s.center‖ = s.radius
EuclideanGeometry.Sphere.IsDiameter.dist_left_right 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [NormedSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (h : s.IsDiameter p₁ p₂) : dist p₁ p₂ = 2 * s.radius
EuclideanGeometry.Sphere.IsDiameter.dist_left_right_div_two 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [NormedSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (h : s.IsDiameter p₁ p₂) : dist p₁ p₂ / 2 = s.radius
EuclideanGeometry.Sphere.IsDiameter.sbtw 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [NormedSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (h : s.IsDiameter p₁ p₂) (hr : s.radius ≠ 0) : Sbtw ℝ p₁ s.center p₂
EuclideanGeometry.Sphere.dist_center_lt_radius_of_sbtw 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {p₁ p₂ p : P} {s : EuclideanGeometry.Sphere P} (hp₁ : p₁ ∈ s) (hp₂ : p₂ ∈ s) (hp : Sbtw ℝ p₁ p p₂) : dist s.center p < s.radius
EuclideanGeometry.Sphere.isDiameter_iff_mem_and_mem_and_dist 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} : s.IsDiameter p₁ p₂ ↔ p₁ ∈ s ∧ p₂ ∈ s ∧ dist p₁ p₂ = 2 * s.radius
EuclideanGeometry.Sphere.dist_center_midpoint_lt_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {p₁ p₂ : P} {s : EuclideanGeometry.Sphere P} (hp₁ : p₁ ∈ s) (hp₂ : p₂ ∈ s) (hp₁p₂ : p₁ ≠ p₂) : dist s.center (midpoint ℝ p₁ p₂) < s.radius
EuclideanGeometry.inner_nonneg_of_dist_le_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (hp₁ : p₁ ∈ s) (hp₂ : dist p₂ s.center ≤ s.radius) : 0 ≤ inner ℝ (p₁ -ᵥ p₂) (p₁ -ᵥ s.center)
EuclideanGeometry.inner_pos_of_dist_lt_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (hp₁ : p₁ ∈ s) (hp₂ : dist p₂ s.center < s.radius) : 0 < inner ℝ (p₁ -ᵥ p₂) (p₁ -ᵥ s.center)
EuclideanGeometry.inner_pos_or_eq_of_dist_le_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (hp₁ : p₁ ∈ s) (hp₂ : dist p₂ s.center ≤ s.radius) : 0 < inner ℝ (p₁ -ᵥ p₂) (p₁ -ᵥ s.center) ∨ p₁ = p₂
EuclideanGeometry.sbtw_of_collinear_of_dist_center_lt_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ p₃ : P} (h : Collinear ℝ {p₁, p₂, p₃}) (hp₁ : p₁ ∈ s) (hp₂ : dist p₂ s.center < s.radius) (hp₃ : p₃ ∈ s) (hp₁p₃ : p₁ ≠ p₃) : Sbtw ℝ p₁ p₂ p₃
EuclideanGeometry.wbtw_of_collinear_of_dist_center_le_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Basic
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ p₃ : P} (h : Collinear ℝ {p₁, p₂, p₃}) (hp₁ : p₁ ∈ s) (hp₂ : dist p₂ s.center ≤ s.radius) (hp₃ : p₃ ∈ s) (hp₁p₃ : p₁ ≠ p₃) : Wbtw ℝ p₁ p₂ p₃
EuclideanGeometry.Sphere.inter_orthRadius_eq_empty_of_radius_lt_dist 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p : P} (hp : s.radius < dist p s.center) : Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p) = ∅
EuclideanGeometry.Sphere.inter_orthRadius_eq_singleton_of_dist_eq_radius 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p : P} (hp : dist p s.center = s.radius) : Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p) = {p}
EuclideanGeometry.Sphere.inter_orthRadius_eq_singleton_iff 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p q : P} : Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p) = {q} ↔ q = p ∧ dist p s.center = s.radius
EuclideanGeometry.Sphere.ncard_inter_orthRadius_le_two 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [hf2 : Fact (Module.finrank ℝ V = 2)] {s : EuclideanGeometry.Sphere P} {p : P} (hpc : p ≠ s.center) : (Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p)).ncard ≤ 2
EuclideanGeometry.Sphere.inter_orthRadius_eq_empty_of_finrank_eq_one 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p : P} (hpc : p ≠ s.center) (hp : dist p s.center ≠ s.radius) (hf : Module.finrank ℝ V = 1) : Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p) = ∅
EuclideanGeometry.Sphere.ncard_inter_orthRadius_eq_two_of_dist_lt_radius 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [hf2 : Fact (Module.finrank ℝ V = 2)] {s : EuclideanGeometry.Sphere P} {p : P} (hp : dist p s.center < s.radius) (hpc : p ≠ s.center) : (Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p)).ncard = 2
EuclideanGeometry.Sphere.inter_orthRadius_eq_empty_iff 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p : P} : Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p) = ∅ ↔ s.radius < dist p s.center ∨ Module.finrank ℝ V = 1 ∧ dist p s.center < s.radius ∧ p ≠ s.center ∨ Subsingleton V ∧ s.radius ≠ 0
EuclideanGeometry.Sphere.mem_inter_orthRadius_iff_vsub_mem_and_norm_sq 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p q : P} (h : 0 ≤ s.radius) : q ∈ Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p) ↔ q -ᵥ p ∈ (ℝ ∙ (p -ᵥ s.center))ᗮ ∧ ‖q -ᵥ p‖ ^ 2 = s.radius ^ 2 - dist p s.center ^ 2
EuclideanGeometry.Sphere.mem_inter_orthRadius_iff_radius_nonneg_and_vsub_mem_and_norm_sq 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p q : P} : q ∈ Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p) ↔ 0 ≤ s.radius ∧ q -ᵥ p ∈ (ℝ ∙ (p -ᵥ s.center))ᗮ ∧ ‖q -ᵥ p‖ ^ 2 = s.radius ^ 2 - dist p s.center ^ 2
EuclideanGeometry.Sphere.vadd_mem_inter_orthRadius_iff_norm_sq 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p : P} {v : V} (h : 0 ≤ s.radius) (hv : v ∈ (ℝ ∙ (p -ᵥ s.center))ᗮ) : v +ᵥ p ∈ Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p) ↔ ‖v‖ ^ 2 = s.radius ^ 2 - dist p s.center ^ 2
EuclideanGeometry.Sphere.inter_orthRadius_eq_of_dist_le_radius_of_norm_eq_one 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [hf2 : Fact (Module.finrank ℝ V = 2)] {s : EuclideanGeometry.Sphere P} {p : P} (hp : dist p s.center ≤ s.radius) (hpc : p ≠ s.center) {v : V} (hv : v ∈ (ℝ ∙ (p -ᵥ s.center))ᗮ) (hv1 : ‖v‖ = 1) : Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p) = {√(s.radius ^ 2 - dist p s.center ^ 2) • v +ᵥ p, -√(s.radius ^ 2 - dist p s.center ^ 2) • v +ᵥ p}
EuclideanGeometry.Sphere.inter_orthRadius_eq_of_dist_le_radius 📋 Mathlib.Geometry.Euclidean.Sphere.OrthRadius
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [hf2 : Fact (Module.finrank ℝ V = 2)] {s : EuclideanGeometry.Sphere P} {p : P} (hp : dist p s.center ≤ s.radius) (hpc : p ≠ s.center) {v : V} (hv : v ∈ (ℝ ∙ (p -ᵥ s.center))ᗮ) (hv0 : v ≠ 0) : Metric.sphere s.center s.radius ∩ ↑(s.orthRadius p) = {(√(s.radius ^ 2 - dist p s.center ^ 2) / ‖v‖) • v +ᵥ p, -(√(s.radius ^ 2 - dist p s.center ^ 2) / ‖v‖) • v +ᵥ p}
EuclideanGeometry.Sphere.pole_polar 📋 Mathlib.Geometry.Euclidean.Sphere.PolePolar
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} (hs : s.radius ≠ 0) (p : P) : s.pole (s.polar p) = p
EuclideanGeometry.Sphere.orthRadius_eq_polar_inversion 📋 Mathlib.Geometry.Euclidean.Sphere.PolePolar
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} (hs : s.radius ≠ 0) (p : P) : s.orthRadius p = s.polar (EuclideanGeometry.inversion s.center s.radius p)
EuclideanGeometry.Sphere.polar_eq_orthRadius_self_iff 📋 Mathlib.Geometry.Euclidean.Sphere.PolePolar
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} (hs : 0 ≤ s.radius) {p : P} : s.polar p = s.orthRadius p ↔ p ∈ s ∨ p = s.center
EuclideanGeometry.Sphere.polar_pole_orthRadius 📋 Mathlib.Geometry.Euclidean.Sphere.PolePolar
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} (hs : s.radius ≠ 0) (p : P) : s.polar (s.pole (s.orthRadius p)) = s.orthRadius p
EuclideanGeometry.Sphere.direction_polar 📋 Mathlib.Geometry.Euclidean.Sphere.PolePolar
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} (hs : s.radius ≠ 0) (p : P) : (s.polar p).direction = (ℝ ∙ (p -ᵥ s.center))ᗮ
EuclideanGeometry.Sphere.ncard_inter_polar_eq_two_of_radius_lt_dist 📋 Mathlib.Geometry.Euclidean.Sphere.PolePolar
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [Fact (Module.finrank ℝ V = 2)] {s : EuclideanGeometry.Sphere P} (hs : 0 < s.radius) {p : P} (hp : s.radius < dist p s.center) : (Metric.sphere s.center s.radius ∩ ↑(s.polar p)).ncard = 2
EuclideanGeometry.Sphere.mem_polar_iff_inner 📋 Mathlib.Geometry.Euclidean.Sphere.PolePolar
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} : p₁ ∈ s.polar p₂ ↔ s.radius = 0 ∨ p₂ = s.center ∨ inner ℝ (p₁ -ᵥ s.center) (p₂ -ᵥ s.center) = s.radius ^ 2
EuclideanGeometry.Sphere.polar_zero_radius 📋 Mathlib.Geometry.Euclidean.Sphere.PolePolar
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} (hs : s.radius = 0) (p : P) : s.polar p = ⊤
EuclideanGeometry.Sphere.isIntTangent_self_iff 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [Nontrivial V] {s : EuclideanGeometry.Sphere P} : s.IsIntTangent s ↔ 0 ≤ s.radius
EuclideanGeometry.Sphere.isExtTangentAt_center_iff 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s₁ s₂ : EuclideanGeometry.Sphere P} : s₁.IsExtTangentAt s₂ s₁.center ↔ s₁.radius = 0 ∧ s₁.center ∈ s₂
EuclideanGeometry.Sphere.isIntTangentAt_center_iff 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s₁ s₂ : EuclideanGeometry.Sphere P} : s₁.IsIntTangentAt s₂ s₁.center ↔ s₁.radius = 0 ∧ s₁.center ∈ s₂
EuclideanGeometry.Sphere.IsExtTangent.dist_center 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s₁ s₂ : EuclideanGeometry.Sphere P} (h : s₁.IsExtTangent s₂) : dist s₁.center s₂.center = s₁.radius + s₂.radius
EuclideanGeometry.Sphere.IsIntTangent.dist_center 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s₁ s₂ : EuclideanGeometry.Sphere P} (h : s₁.IsIntTangent s₂) : dist s₁.center s₂.center = s₂.radius - s₁.radius
EuclideanGeometry.Sphere.isExtTangent_iff_dist_center 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s₁ s₂ : EuclideanGeometry.Sphere P} : s₁.IsExtTangent s₂ ↔ dist s₁.center s₂.center = s₁.radius + s₂.radius ∧ 0 ≤ s₁.radius ∧ 0 ≤ s₂.radius
EuclideanGeometry.Sphere.isIntTangent_iff_dist_center 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [Nontrivial V] {s₁ s₂ : EuclideanGeometry.Sphere P} : s₁.IsIntTangent s₂ ↔ dist s₁.center s₂.center = s₂.radius - s₁.radius ∧ 0 ≤ s₁.radius ∧ 0 ≤ s₂.radius
EuclideanGeometry.Sphere.ncard_tangentsFrom_eq_two_of_radius_lt_dist 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [Fact (Module.finrank ℝ V = 2)] {s : EuclideanGeometry.Sphere P} (hs : 0 < s.radius) {p : P} (hp : s.radius < dist p s.center) : (s.tangentsFrom p).ncard = 2
EuclideanGeometry.Sphere.IsTangent.infDist_eq_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {as : AffineSubspace ℝ P} (h : s.IsTangent as) : Metric.infDist s.center ↑as = s.radius
EuclideanGeometry.Sphere.tangentsFrom_eq_empty_of_dist_lt_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p : P} (hp : dist p s.center < s.radius) : s.tangentsFrom p = ∅
EuclideanGeometry.Sphere.IsTangent.radius_le_dist_center 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {as : AffineSubspace ℝ P} (h : s.IsTangent as) {p : P} (hp : p ∈ as) : s.radius ≤ dist p s.center
EuclideanGeometry.Sphere.isTangentAt_center_iff 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {as : AffineSubspace ℝ P} : s.IsTangentAt s.center as ↔ s.radius = 0 ∧ s.center ∈ as
EuclideanGeometry.Sphere.IsTangent.notMem_of_dist_lt 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {as : AffineSubspace ℝ P} (h : s.IsTangent as) {p : P} (hp : dist p s.center < s.radius) : p ∉ as
EuclideanGeometry.Sphere.IsTangentAt.radius_lt_dist_center 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {as : AffineSubspace ℝ P} {p q : P} (h : s.IsTangentAt p as) (hq : q ∈ as) (hqp : q ≠ p) : s.radius < dist q s.center
EuclideanGeometry.Sphere.tangentsFrom_eq_image_orthRadius_inter_polar 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p : P} (hp : p ≠ s.center) : s.tangentsFrom p = s.orthRadius '' (Metric.sphere s.center s.radius ∩ ↑(s.polar p))
EuclideanGeometry.Sphere.IsTangentAt.dist_sq_eq_of_mem 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p q : P} {as : AffineSubspace ℝ P} (h : s.IsTangentAt p as) (hq : q ∈ as) : dist q s.center ^ 2 = s.radius ^ 2 + dist q p ^ 2
EuclideanGeometry.Sphere.infDist_eq_radius_iff_isTangent 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {as : AffineSubspace ℝ P} [Nonempty ↥as] [as.direction.HasOrthogonalProjection] : Metric.infDist s.center ↑as = s.radius ↔ s.IsTangent as
EuclideanGeometry.Sphere.IsTangentAt.eq_orthRadius_of_finrank_add_one_eq 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {as : AffineSubspace ℝ P} {p : P} (ht : s.IsTangentAt p as) (hr : s.radius ≠ 0) (hfr : Module.finrank ℝ ↥as.direction + 1 = Module.finrank ℝ V) : as = s.orthRadius p
EuclideanGeometry.Sphere.dist_orthogonalProjection_eq_radius_iff_isTangent 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {as : AffineSubspace ℝ P} [Nonempty ↥as] [as.direction.HasOrthogonalProjection] : dist s.center ↑((EuclideanGeometry.orthogonalProjection as) s.center) = s.radius ↔ s.IsTangent as
EuclideanGeometry.Sphere.dist_orthogonalProjection_eq_radius_iff_isTangentAt 📋 Mathlib.Geometry.Euclidean.Sphere.Tangent
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {as : AffineSubspace ℝ P} [Nonempty ↥as] [as.direction.HasOrthogonalProjection] : dist s.center ↑((EuclideanGeometry.orthogonalProjection as) s.center) = s.radius ↔ s.IsTangentAt (↑((EuclideanGeometry.orthogonalProjection as) s.center)) as
Affine.Simplex.insphere_radius 📋 Mathlib.Geometry.Euclidean.Incenter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {n : ℕ} [NeZero n] (s : Affine.Simplex ℝ P n) : s.insphere.radius = s.inradius
Affine.Simplex.exsphere_radius 📋 Mathlib.Geometry.Euclidean.Incenter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {n : ℕ} [NeZero n] (s : Affine.Simplex ℝ P n) (signs : Finset (Fin (n + 1))) : (s.exsphere signs).radius = s.exradius signs
Affine.Simplex.circumsphere_radius 📋 Mathlib.Geometry.Euclidean.Circumcenter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {n : ℕ} (s : Affine.Simplex ℝ P n) : s.circumsphere.radius = s.circumradius
AffineIndependent.existsUnique_dist_eq 📋 Mathlib.Geometry.Euclidean.Circumcenter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {ι : Type u_3} [hne : Nonempty ι] [Finite ι] {p : ι → P} (ha : AffineIndependent ℝ p) : ∃! cs, cs.center ∈ affineSpan ℝ (Set.range p) ∧ Set.range p ⊆ Metric.sphere cs.center cs.radius
Affine.Simplex.circumsphere_unique_dist_eq 📋 Mathlib.Geometry.Euclidean.Circumcenter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {n : ℕ} (s : Affine.Simplex ℝ P n) : (s.circumsphere.center ∈ affineSpan ℝ (Set.range s.points) ∧ Set.range s.points ⊆ Metric.sphere s.circumsphere.center s.circumsphere.radius) ∧ ∀ (cs : EuclideanGeometry.Sphere P), cs.center ∈ affineSpan ℝ (Set.range s.points) ∧ Set.range s.points ⊆ Metric.sphere cs.center cs.radius → cs = s.circumsphere
EuclideanGeometry.existsUnique_dist_eq_of_insert 📋 Mathlib.Geometry.Euclidean.Circumcenter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : AffineSubspace ℝ P} [s.direction.HasOrthogonalProjection] {ps : Set P} (hnps : ps.Nonempty) {p : P} (hps : ps ⊆ ↑s) (hp : p ∉ s) (hu : ∃! cs, cs.center ∈ s ∧ ps ⊆ Metric.sphere cs.center cs.radius) : ∃! cs₂, cs₂.center ∈ affineSpan ℝ (insert p ↑s) ∧ insert p ps ⊆ Metric.sphere cs₂.center cs₂.radius
EuclideanGeometry.Sphere.angle_center_eq_zero_iff_eq 📋 Mathlib.Geometry.Euclidean.Angle.Sphere
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (hp₁ : p₁ ∈ s) (hp₂ : p₂ ∈ s) (hr : s.radius ≠ 0) : EuclideanGeometry.angle p₁ s.center p₂ = 0 ↔ p₁ = p₂
EuclideanGeometry.Sphere.angle_center_eq_pi_iff_isDiameter 📋 Mathlib.Geometry.Euclidean.Angle.Sphere
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (hp₁ : p₁ ∈ s) (hp₂ : p₂ ∈ s) (hr : s.radius ≠ 0) : EuclideanGeometry.angle p₁ s.center p₂ = Real.pi ↔ s.IsDiameter p₁ p₂
EuclideanGeometry.Sphere.dist_div_cos_oangle_center_eq_two_mul_radius 📋 Mathlib.Geometry.Euclidean.Angle.Sphere
{V : Type u_3} {P : Type u_4} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [hd2 : Fact (Module.finrank ℝ V = 2)] [Module.Oriented ℝ V (Fin 2)] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (hp₁ : p₁ ∈ s) (hp₂ : p₂ ∈ s) (h : p₁ ≠ p₂) : dist p₁ p₂ / (EuclideanGeometry.oangle p₂ p₁ s.center).cos = 2 * s.radius
EuclideanGeometry.Sphere.dist_div_cos_oangle_center_div_two_eq_radius 📋 Mathlib.Geometry.Euclidean.Angle.Sphere
{V : Type u_3} {P : Type u_4} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [hd2 : Fact (Module.finrank ℝ V = 2)] [Module.Oriented ℝ V (Fin 2)] {s : EuclideanGeometry.Sphere P} {p₁ p₂ : P} (hp₁ : p₁ ∈ s) (hp₂ : p₂ ∈ s) (h : p₁ ≠ p₂) : dist p₁ p₂ / (EuclideanGeometry.oangle p₂ p₁ s.center).cos / 2 = s.radius
EuclideanGeometry.Sphere.dist_div_sin_oangle_eq_two_mul_radius 📋 Mathlib.Geometry.Euclidean.Angle.Sphere
{V : Type u_3} {P : Type u_4} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [hd2 : Fact (Module.finrank ℝ V = 2)] [Module.Oriented ℝ V (Fin 2)] {s : EuclideanGeometry.Sphere P} {p₁ p₂ p₃ : P} (hp₁ : p₁ ∈ s) (hp₂ : p₂ ∈ s) (hp₃ : p₃ ∈ s) (hp₁p₂ : p₁ ≠ p₂) (hp₁p₃ : p₁ ≠ p₃) (hp₂p₃ : p₂ ≠ p₃) : dist p₁ p₃ / |(EuclideanGeometry.oangle p₁ p₂ p₃).sin| = 2 * s.radius
EuclideanGeometry.Sphere.dist_div_sin_oangle_div_two_eq_radius 📋 Mathlib.Geometry.Euclidean.Angle.Sphere
{V : Type u_3} {P : Type u_4} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [hd2 : Fact (Module.finrank ℝ V = 2)] [Module.Oriented ℝ V (Fin 2)] {s : EuclideanGeometry.Sphere P} {p₁ p₂ p₃ : P} (hp₁ : p₁ ∈ s) (hp₂ : p₂ ∈ s) (hp₃ : p₃ ∈ s) (hp₁p₂ : p₁ ≠ p₂) (hp₁p₃ : p₁ ≠ p₃) (hp₂p₃ : p₂ ≠ p₃) : dist p₁ p₃ / |(EuclideanGeometry.oangle p₁ p₂ p₃).sin| / 2 = s.radius
EuclideanGeometry.Sphere.IsTangentAt.two_zsmul_oangle_eq_pi 📋 Mathlib.Geometry.Euclidean.Angle.Sphere
{V : Type u_3} {P : Type u_4} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] [hd2 : Fact (Module.finrank ℝ V = 2)] [Module.Oriented ℝ V (Fin 2)] {s : EuclideanGeometry.Sphere P} {p q : P} {as : AffineSubspace ℝ P} (h : s.IsTangentAt p as) (hs : s.radius ≠ 0) (hq : q ∈ as) (hqp : q ≠ p) : 2 • EuclideanGeometry.oangle q p s.center = ↑Real.pi
Affine.Simplex.ninePointCircle_radius 📋 Mathlib.Geometry.Euclidean.NinePointCircle
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {n : ℕ} (s : Affine.Simplex ℝ P n) : s.ninePointCircle.radius = s.circumradius / ↑n
Affine.Simplex.ninePointCircle_map 📋 Mathlib.Geometry.Euclidean.NinePointCircle
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {V₂ : Type u_3} {P₂ : Type u_4} [NormedAddCommGroup V₂] [InnerProductSpace ℝ V₂] [MetricSpace P₂] [NormedAddTorsor V₂ P₂] {n : ℕ} (s : Affine.Simplex ℝ P n) (f : P →ᵃⁱ[ℝ] P₂) : (s.map f.toAffineMap ⋯).ninePointCircle = { center := f s.ninePointCircle.center, radius := s.ninePointCircle.radius }
Affine.Simplex.ninePointCircle_restrict 📋 Mathlib.Geometry.Euclidean.NinePointCircle
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {n : ℕ} (s : Affine.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 }
EuclideanGeometry.Sphere.power_eq_zero_iff_mem_sphere 📋 Mathlib.Geometry.Euclidean.Sphere.Power
{P : Type u_2} [MetricSpace P] {s : EuclideanGeometry.Sphere P} {p : P} (hr : 0 ≤ s.radius) : s.power p = 0 ↔ p ∈ s
EuclideanGeometry.Sphere.power_neg_iff_dist_center_lt_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Power
{P : Type u_2} [MetricSpace P] {s : EuclideanGeometry.Sphere P} {p : P} (hr : 0 ≤ s.radius) : s.power p < 0 ↔ dist p s.center < s.radius
EuclideanGeometry.Sphere.power_nonneg_iff_radius_le_dist_center 📋 Mathlib.Geometry.Euclidean.Sphere.Power
{P : Type u_2} [MetricSpace P] {s : EuclideanGeometry.Sphere P} {p : P} (hr : 0 ≤ s.radius) : 0 ≤ s.power p ↔ s.radius ≤ dist p s.center
EuclideanGeometry.Sphere.power_nonpos_iff_dist_center_le_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Power
{P : Type u_2} [MetricSpace P] {s : EuclideanGeometry.Sphere P} {p : P} (hr : 0 ≤ s.radius) : s.power p ≤ 0 ↔ dist p s.center ≤ s.radius
EuclideanGeometry.Sphere.power_pos_iff_radius_lt_dist_center 📋 Mathlib.Geometry.Euclidean.Sphere.Power
{P : Type u_2} [MetricSpace P] {s : EuclideanGeometry.Sphere P} {p : P} (hr : 0 ≤ s.radius) : 0 < s.power p ↔ s.radius < dist p s.center
EuclideanGeometry.Sphere.mul_dist_eq_power_of_radius_le_dist_center 📋 Mathlib.Geometry.Euclidean.Sphere.Power
{V : Type u_1} [NormedAddCommGroup V] [InnerProductSpace ℝ V] {P : Type u_2} [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p a b : P} (hr : 0 ≤ s.radius) (hp : p ∈ line[ℝ, a, b]) (ha : a ∈ s) (hb : b ∈ s) (hle : s.radius ≤ dist p s.center) : dist p a * dist p b = s.power p
EuclideanGeometry.Sphere.mul_dist_eq_neg_power_of_dist_center_le_radius 📋 Mathlib.Geometry.Euclidean.Sphere.Power
{V : Type u_1} [NormedAddCommGroup V] [InnerProductSpace ℝ V] {P : Type u_2} [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p a b : P} (hr : 0 ≤ s.radius) (hp : p ∈ line[ℝ, a, b]) (ha : a ∈ s) (hb : b ∈ s) (hle : dist p s.center ≤ s.radius) : dist p a * dist p b = -s.power p
EuclideanGeometry.Sphere.sbtw_secondInter 📋 Mathlib.Geometry.Euclidean.Sphere.SecondInter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p p' : P} (hp : p ∈ s) (hp' : dist p' s.center < s.radius) : Sbtw ℝ p p' (s.secondInter p (p' -ᵥ p))
EuclideanGeometry.Sphere.wbtw_secondInter 📋 Mathlib.Geometry.Euclidean.Sphere.SecondInter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {p p' : P} (hp : p ∈ s) (hp' : dist p' s.center ≤ s.radius) : Wbtw ℝ p p' (s.secondInter p (p' -ᵥ p))
EuclideanGeometry.Sphere.secondInter_map 📋 Mathlib.Geometry.Euclidean.Sphere.SecondInter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {V₂ : Type u_3} {P₂ : Type u_4} [NormedAddCommGroup V₂] [InnerProductSpace ℝ V₂] [MetricSpace P₂] [NormedAddTorsor V₂ P₂] (s : EuclideanGeometry.Sphere P) (p : P) (v : V) (f : P →ᵃⁱ[ℝ] P₂) : { center := f s.center, radius := s.radius }.secondInter (f p) (f.linearIsometry v) = f (s.secondInter p v)
EuclideanGeometry.Sphere.sOppSide_faceOpposite_secondInter_of_mem_interior 📋 Mathlib.Geometry.Euclidean.Sphere.SecondInter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {n : ℕ} [n.AtLeastTwo] {sx : Affine.Simplex ℝ P n} {i : Fin (n + 1)} (hi : sx.points i ∈ s) (hsx : ∀ (j : Fin (n + 1)), dist (sx.points j) s.center ≤ s.radius) {p : P} (hp : p ∈ sx.interior) : (affineSpan ℝ (Set.range (sx.faceOpposite i).points)).SOppSide (sx.points i) (s.secondInter (sx.points i) (p -ᵥ sx.points i))
EuclideanGeometry.Sphere.sOppSide_faceOpposite_secondInter_of_mem_interior_faceOpposite 📋 Mathlib.Geometry.Euclidean.Sphere.SecondInter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] {s : EuclideanGeometry.Sphere P} {n : ℕ} [NeZero n] {sx : Affine.Simplex ℝ P n} {i : Fin (n + 1)} (hi : sx.points i ∈ s) (hsx : ∀ (j : Fin (n + 1)), dist (sx.points j) s.center ≤ s.radius) {p : P} (hp : p ∈ (sx.faceOpposite i).interior) : (affineSpan ℝ (Set.range (sx.faceOpposite i).points)).SOppSide (sx.points i) (s.secondInter (sx.points i) (p -ᵥ sx.points i))
EuclideanGeometry.Sphere.coe_secondInter 📋 Mathlib.Geometry.Euclidean.Sphere.SecondInter
{V : Type u_1} {P : Type u_2} [NormedAddCommGroup V] [InnerProductSpace ℝ V] [MetricSpace P] [NormedAddTorsor V P] (as : AffineSubspace ℝ P) [Nonempty ↥as] (s : EuclideanGeometry.Sphere ↥as) (p : ↥as) (v : ↥as.direction) : ↑(s.secondInter p v) = { center := ↑s.center, radius := s.radius }.secondInter ↑p ↑v

About

Loogle searches Lean and Mathlib definitions and theorems.

You can use Loogle from within the Lean4 VSCode language extension using the Loogle command from the command palette. You can also try the #loogle command from LeanSearchClient, the CLI version, the Loogle VS Code extension, the lean.nvim integration or the Zulip bot.

Usage

Loogle finds definitions and lemmas in various ways:

By constant:
🔍 Real.sin
finds all lemmas whose statement somehow mentions the sine function.
By lemma name substring:
🔍 "differ"
finds all lemmas that have "differ" somewhere in their lemma name.
By subexpression:
🔍 _ * (_ ^ _)
finds all lemmas whose statements somewhere include a product where the second argument is raised to some power.

The pattern can also be non-linear, as in
🔍 Real.sqrt ?a * Real.sqrt ?a

If the pattern has parameters, they are matched in any order. Both of these will find List.map:
🔍 (?a -> ?b) -> List ?a -> List ?b
🔍 List ?a -> (?a -> ?b) -> List ?b
By main conclusion:
🔍 |- tsum _ = _ * tsum _
finds all lemmas where the conclusion (the subexpression to the right of all → and ∀) has the given shape.

As before, if the pattern has parameters, they are matched against the hypotheses of the lemma in any order; for example,
🔍 |- _ < _ → tsum _ < tsum _
will find tsum_lt_tsum even though the hypothesis f i < g i is not the last.
You can filter for definitions vs theorems: Using ⊢ (_ : Type _) finds all definitions which provide data while ⊢ (_ : Prop) finds all theorems (and definitions of proofs).

If you pass more than one such search filter, separated by commas Loogle will return lemmas which match all of them. The search
🔍 Real.sin, "two", tsum, _ * _, _ ^ _, |- _ < _ → _
would find all lemmas which mention the constants Real.sin and tsum, have "two" as a substring of the lemma name, include a product and a power somewhere in the type, and have a hypothesis of the form _ < _ (if there were any such lemmas). Metavariables (?a) are assigned independently in each filter.

The #lucky button will directly send you to the documentation of the first hit.

Source code

You can find the source code for this service at https://github.com/nomeata/loogle. The https://loogle.lean-lang.org/ service is provided by the Lean FRO. Please review the Lean FRO Terms of Use and Privacy Policy.

This is Loogle revision 9f11169 serving mathlib revision 69fae59