Function unimodular()
returns an array a
of dimension
c(2,2,u)
(where u
is a complicated function of n
).
Thus 3-slices of a
(that is, a[,,i]
) are unimodular.
Function unimodularity()
returns the result of applying
FUN()
to the unimodular transformations of o
. The
function returns a vector of length dim(unimodular(n))[3]
; if
FUN()
is unimodular and roundoff is neglected, all elements of
the vector should be identical.