vector c(k1,...,kn) specifying the moment X1**k1 *...* Xn**kn
current.matrix
upper-triangular integer matrix under consideration in recursion
current.cell
cell in current matrix under consideration in recursion
moment.rep
current set of representations; mult.moments adds each satisfying matrix to moment.rep
row_col
matrix giving rows and columns for square matrix for each cell
Value
moment representation, moment.rep, augmented with additional representations
Details
Each row of the representation gives the exponents for a single product of covariance terms. For example, (1,2,0) represents S11**1 S12**2 S22**0, where the Sij are the covariances.
This function would normally only be called by callmultmoments.
References
K Phillips, Symbolic Computation of the Central Moments of the Multivariate Normal Distribution,
Journal of Statistical Software, 2010.