Definition interp_CP {m : nat} (cp : cartesianPower positive (S m)) (interp: positive -> COINCpoint) : cartesianPower COINCpoint (S m).

Lemma interp_CPHdOK {m : nat} : forall (cp : cartesianPower positive (S m)) interp, interp_CP (headCPbis cp) interp = headCP (interp_CP cp interp).