Theorems · Theorem · geometry

EuclideanGeometry.inter_eq_singleton_orthogonalProjection

∀ {𝕜 : Type u_1} {V : Type u_2} {P : Type u_3} [inst : RCLike 𝕜] [inst_1 : NormedAddCommGroup V]
  [inst_2 : InnerProductSpace 𝕜 V] [inst_3 : MetricSpace P] [inst_4 : NormedAddTorsor V P] {s : AffineSubspace 𝕜 P}
  [inst_5 : Nonempty ↥s] [inst_6 : s.direction.HasOrthogonalProjection] (p : P),
  ↑s ∩ ↑(AffineSubspace.mk' p s.directionᗮ) = {↑((EuclideanGeometry.orthogonalProjection s) p)}

The intersection of the subspace and the orthogonal subspace through the given point is the orthogonalProjection of that point onto the subspace.

Defined in

Mathlib.Geometry.Euclidean.Projection

Cited by

2 results in Mathlib

Foundations

Depth 180 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

RCLikeNormedAddCommGroupInnerProductSpaceMetricSpaceNormedAddTorsorNonemptySubmodule.HasOrthogonalProjection