`BookProof.LorentzGroup.eta_mul_self` : eta * eta = 1

Proved

BookProof.LorentzGroup.eta_mul_self

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

theoremstimepiece

Prove the following Lean 4 theorem from ChapterLorentzGroup.

BookProof.LorentzGroup.eta_mul_self : eta * eta = 1

Formalization note: Lean 4 identifier BookProof.LorentzGroup.eta_mul_self.

Preamble

-- Generated from ChapterLorentzGroup.lean — theorem BookProof.LorentzGroup.eta_mul_self
import Mathlib
import Definitions.Def_ChapterLorentzGroup
open BookProof.LorentzGroup



open Matrix

Formal statement

theorem BookProof.LorentzGroup.eta_mul_self : eta * eta = 1 := by sorry

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