Higher moments

It is not hard to establish the general formula for the third moment,

 

nor generally the analogous moment in terms of the tensor power sum. However, the first two moments are the most important in view of the role of the average and the variance in statistical analyses. Specifically, configurations of zero variance in their number of ancestors are candidates for reversible rules.

---

Harold V. McIntosh
E-mail:mcintosh@servidor.unam.mx