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