Vector α n and Sym α n are fintypes when α is.

instance Vector.fintype {α : Type u_1} [Fintype α] {n : ℕ} : Fintype (Mathlib.Vector α n)

Equations

• Vector.fintype = Fintype.ofEquiv (Fin n → α) (Equiv.vectorEquivFin α n).symm

instance instFintypeSym'OfDecidableEq {α : Type u_1} [DecidableEq α] [Fintype α] {n : ℕ} : Fintype (Sym.Sym' α n)

Equations

• instFintypeSym'OfDecidableEq = Quotient.fintype (Mathlib.Vector.Perm.isSetoid α n)

instance instFintypeSymOfDecidableEq {α : Type u_1} [DecidableEq α] [Fintype α] {n : ℕ} : Fintype (Sym α n)

Equations

• instFintypeSymOfDecidableEq = Fintype.ofEquiv (Sym.Sym' α n) Sym.symEquivSym'.symm