Returns a list, each element of which is a subhypercube of a.
Note that major diagonals are also returned (as n-by-1 arrays).
The names of the list are the extracted subhypercubes. Consider
a <- magichypercube.4n(1,d=4) (so n=4) and if jj <-
allsubhypercubes(a), consider jj[9]. The name of
jj[9] is "n-i+1,i,i,"; its value is a square matrix. The
columns of jj[9] may be recovered by a[n-i+1,i,i,]
with \(i=1\ldots n\) (NB: that is,
jj[[9]] == cbind(a[n-1+1,1,1,],
a[n-2+1,2,2,], a[n-3+1,3,3,], a[n-4+1,4,4,]) where n=4).
The list does not include the whole array.