`BookProof.ChapterEntropy.card_bijections` (n : ℕ) : Fintype.card (Equiv.Perm (Fin n)) = Nat.factorial n

Initializing...

`BookProof.ChapterEntropy.card_bijections` (n : ℕ) : Fintype.card (Equiv.Perm (Fin n)) = Nat.factorial n · Prove2Me