fact: Definition compute_fstail' {A} n (a : A) (v : FinSeq (pred n) A) : fstail' n (fscons' n a v) == v.
imports: HoTT.Basics HoTT.Types HoTT.HSet HoTT.Spaces.Finite.Fin HoTT.Spaces.Finite.FinInduction HoTT.Spaces.Nat.Core