`BookProof.ChapterPinOmega.qi_sq` : qi * qi = -1

Proved

BookProof.ChapterPinOmega.qi_sq

by leonardopedro · Oct 10, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterPinOmega.

BookProof.ChapterPinOmega.qi_sq : qi * qi = -1

Formalization note: Lean 4 identifier BookProof.ChapterPinOmega.qi_sq.

Preamble

-- Generated from ChapterPinOmega.lean — theorem BookProof.ChapterPinOmega.qi_sq
import Definitions.Def_ChapterA3
import Mathlib
import Definitions.Def_ChapterPinOmega
import Definitions.Def_ChapterPinDoubleCover
open BookProof.ChapterPinDoubleCover
open BookProof.ChapterPinOmega


open Matrix


open BookProof.ChapterA3

Formal statement

theorem BookProof.ChapterPinOmega.qi_sq : qi * qi = -1 := by sorry

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