`BookProof.ChapterA3q.projMixed_idem` {N : ℕ} (hN : 2 ≤ N) : projMixed N * projMixed N = projMixed N

Initializing...

`BookProof.ChapterA3q.projMixed_idem` {N : ℕ} (hN : 2 ≤ N) : projMixed N * projMixed N = projMixed N · Prove2Me