Show that joint cumulants of ordinary k-statistics in which the partition contains a unit block, e.g. k

Show that joint cumulants of ordinary k-statistics in which the partition contains a unit block, e.g. κk

(r∣s,t∣u, υ,w), can be found from the expression in which the unit block is deleted, by dividing by n and adding the extra index at all possible positions. Hence, using the expression given above for

κk

(s,t∣u, v,w), show that