vandermondeDeterminant(l,R)
A Vandermonde matrix is a matrix of $n$ elements is constructed by putting in each column all the powers from 0 to $n1$ of each of the elements.
If $x_i$ are the elements used to construct the matrix then it can be proven that the determinant has the following form.
$\prod_{0 \leq i < j < n} (x_jx_i) $



The object vandermondeDeterminant is a method function with options.