Converts linear indexing specification of a Wigner function to L,M,N indexing. In the linear indexing convention, the Wigner functions are listed in the order of increasing L rank. Within each L rank, the func- tions are listed in the order of decreasing left index, and, for each left index, in the order of decreasing right index. Syntax:
Wigner functions are enumerated using one base indexing, that is:
I=1 -> (L=0,M=0,N=0) I=2 -> (L=1,M=1,N=1) I=3 -> (L=1,M=1,N=0), et cetera...
Arrays of any dimension are accepted as arguments.