def newton_point(self):
        if self._newton_point is None:
            g = self.jac
            B = self.hess
            cho_info = scipy.linalg.cho_factor(B)
            self._newton_point = -scipy.linalg.cho_solve(cho_info, g)
        return self._newton_point
Parse a sequence of RFC 2822 phrases.
dataset/ETHPy150Open scipy/scipy/scipy/optimize/_trustregion_dogleg.py/DoglegSubproblem.newton_point--crossover with--dataset/ETHPy150Open ofermend/medicare-demo/socialite/jython/Lib/rfc822.py/AddrlistClass.getphraselist