`BookProof.ChapterA3j.chir_sq` : chir * chir = -1

Proved

BookProof.ChapterA3j.chir_sq

by leonardopedro · Oct 6, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterA3j.

BookProof.ChapterA3j.chir_sq : chir * chir = -1

Formalization note: Lean 4 identifier BookProof.ChapterA3j.chir_sq.

Preamble

-- Generated from ChapterA3j.lean — theorem BookProof.ChapterA3j.chir_sq
import Mathlib
import Definitions.Def_ChapterA3j
import Definitions.Def_ChapterA3
open BookProof.ChapterA3
open BookProof.ChapterA3j


open Matrix


open BookProof.ChapterA3

Formal statement

theorem BookProof.ChapterA3j.chir_sq : chir * chir = -1 := by sorry

View graph