`BookProof.ChapterGravityPolymomentum.proj_metric` (v : Fin 4 → ℝ) (hv : minkSq v = -1) : proj v metric = metric + vecMulVec v v

Proved

BookProof.ChapterGravityPolymomentum.proj_metric

by leonardopedro · Oct 9, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterGravityPolymomentum.

BookProof.ChapterGravityPolymomentum.proj_metric (v : Fin 4 → ℝ) (hv : minkSq v = -1) : proj v metric = metric + vecMulVec v v

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

Preamble

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



open Matrix
open scoped BigOperators
open BookProof.ChapterGravityProjector

Formal statement

theorem BookProof.ChapterGravityPolymomentum.proj_metric (v : Fin 4 → ℝ) (hv : minkSq v = -1) :
    proj v metric = metric + vecMulVec v v := by sorry

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