Definition OCP {n : nat} (cp : cartesianPower positive (S (S n))) : cartesianPower positive (S (S n)).

Lemma CPLOCPTlOK {n : nat} :
forall (cp : cartesianPower positive (S (S (S n)))),
headCP cp = headCP (OCP cp) ->
CPToList (OCP (tailCP cp)) = CPToList (tailCP (OCP cp)).