def __init__(self, n, m):
self._L = ones((n, m))<EOL>self._Lu = Vector(self._L.ravel())<EOL>Function.__init__(self, "<STR_LIT>", Lu=self._Lu)<EOL>
Constructor.

Parameters
----------
n : int
    Covariance dimension.
m : int
    Upper limit of the covariance matrix rank.