`BookProof.ChapterGravityPolymomentum.spatialProj_eq` (v : Fin 4 → ℝ) : spatialProj v = 1 + vecMulVec v (lower v)

Proved

BookProof.ChapterGravityPolymomentum.spatialProj_eq

by leonardopedro · Oct 8, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterGravityPolymomentum.

BookProof.ChapterGravityPolymomentum.spatialProj_eq (v : Fin 4 → ℝ) : spatialProj v = 1 + vecMulVec v (lower v)

Formalization note: Lean 4 identifier BookProof.ChapterGravityPolymomentum.spatialProj_eq.

Preamble

-- Generated from ChapterGravityPolymomentum.lean — theorem BookProof.ChapterGravityPolymomentum.spatialProj_eq
import Mathlib
import Definitions.Def_ChapterGravityPolymomentum
import Definitions.Def_ChapterGravityProjector
open BookProof.ChapterGravityProjector
open BookProof.ChapterGravityPolymomentum



open Matrix
open scoped BigOperators
open BookProof.ChapterGravityProjector

Formal statement

theorem BookProof.ChapterGravityPolymomentum.spatialProj_eq (v : Fin 4 → ℝ) : spatialProj v = 1 + vecMulVec v (lower v) := by sorry

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