Systematically generates unimodular matrices; numerical verfication of a function's unimodularness
Maximum size of entries of matrices
Two element vector
Function whose unimodularity is to be checked
Further arguments passed to
Here, a ‘unimodular’ matrix is of size 2x2, with integer entries and a determinant of unity.
unimodular() returns an array
a of dimension
u is a complicated function of
Thus 3-slices of
a (that is,
a[,,i]) are unimodular.
unimodularity() returns the result of applying
FUN() to the unimodular transformations of
function returns a vector of length
FUN() is unimodular and roundoff is neglected, all elements of
the vector should be identical.
as.primitive(), a ‘unimodular’ may have
determinant minus one.
Robin K. S. Hankin
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