`BookProof.ChapterA3l.projAsym_idem` : projAsym * projAsym = projAsym

Proved

BookProof.ChapterA3l.projAsym_idem

by leonardopedro · Oct 7, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterA3l.

BookProof.ChapterA3l.projAsym_idem : projAsym * projAsym = projAsym

Formalization note: Lean 4 identifier BookProof.ChapterA3l.projAsym_idem.

Preamble

-- Generated from ChapterA3l.lean — theorem BookProof.ChapterA3l.projAsym_idem
import Definitions.Def_ChapterA3
import Definitions.Def_ChapterA3j
import Mathlib
import Definitions.Def_ChapterA3l
import Definitions.Def_ChapterA3k
open BookProof.ChapterA3k
open BookProof.ChapterA3l


open Matrix
open scoped Kronecker


open BookProof.ChapterA3 BookProof.ChapterA3j BookProof.ChapterA3k

Formal statement

theorem BookProof.ChapterA3l.projAsym_idem : projAsym * projAsym = projAsym := by sorry

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