def extract_dual_value(self, monomial, blocks=None):
return extract_dual_value(self, monomial, blocks)<EOL>
Given a solution of the dual problem and a monomial, it returns the
        inner product of the corresponding coefficient matrix and the dual
        solution. It can be restricted to certain blocks.

        :param monomial: The monomial for which the value is requested.
        :type monomial: :class:`sympy.core.exp.Expr`.
        :param monomial: The monomial for which the value is requested.
        :type monomial: :class:`sympy.core.exp.Expr`.
        :param blocks: Optional parameter to specify the blocks to be included.
        :type blocks: list of `int`.
        :returns: The value of the monomial in the solved relaxation.
        :rtype: float.