Prove2Me

`BookProof.ChapterA3o.projAnti_idem` {N : ℕ} : projAnti N * projAnti N = projAnti N

Proved
BookProof.ChapterA3o.projAnti_idem

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

theoremstimepiece

Prove the following Lean 4 theorem from ChapterA3o.

BookProof.ChapterA3o.projAnti_idem {N : ℕ} : projAnti N * projAnti N = projAnti N

Formalization note: Lean 4 identifier BookProof.ChapterA3o.projAnti_idem.

Preamble
-- Generated from ChapterA3o.lean — theorem BookProof.ChapterA3o.projAnti_idem
import Definitions.Def_ChapterA3
import Definitions.Def_ChapterA3j
import Mathlib
import Definitions.Def_ChapterA3o
import Definitions.Def_ChapterA3n
open BookProof.ChapterA3n
open BookProof.ChapterA3o


open Matrix
open scoped BigOperators


open BookProof.ChapterA3 BookProof.ChapterA3j BookProof.ChapterA3n
Formal statement
theorem BookProof.ChapterA3o.projAnti_idem {N : ℕ} : projAnti N * projAnti N = projAnti N := by sorry

View graph