def get_sos_decomposition(self, threshold=<NUM_LIT:0.0>):
return get_sos_decomposition(self, threshold=threshold)<EOL>
Given a solution of the dual problem, it returns the SOS
        decomposition.

        :param threshold: Optional parameter for specifying the threshold value
                          below which the eigenvalues and entries of the
                          eigenvectors are disregarded.
        :type threshold: float.
        :returns: The SOS decomposition of [sigma_0, sigma_1, ..., sigma_m]
        :rtype: list of :class:`sympy.core.exp.Expr`.