Saya mau tau In general, we have dari Cumulant. Jelaskan dalam bahasa sunda

the sum is over all partitions π of the set { 1, ..., n } of indices, and

π1, ..., πb are all of the "blocks" of the partition π; the expression κ(Xπk) indicates that the joint cumulant of the random variables whose indices are in that block of the partition.