(self, X)
Tensorflow graph for the transformation of U -> V

        :param X: N x P tensor
        :return: N x Q tensor
Tensorflow graph for the transformation of U -> V
Tensorflow graph for the transformation of U - > V
def build_forward(self, X):
        """
        Tensorflow graph for the transformation of U -> V

        :param X: N x P tensor
        :return: N x Q tensor
        """
        raise NotImplementedError
def build_forward ( self , X ) : raise NotImplementedError