def eigendecompose(self, normalise=False):
        """
        Performs and eigendecomposition of the tensor and orders into 
        descending eigenvalues
        """
        self.eigenvalues, self.eigenvectors = utils.eigendecompose(self.tensor,
                                                                   normalise)
        return self.eigenvalues, self.eigenvectors
Performs and eigendecomposition of the tensor and orders into 
        descending eigenvalues