LocalModel.gn_quadratic
=======================

.. py:method:: t3toolbox.backend.optimizers.LocalModel.gn_quadratic(p)

   .. code-block:: python

      def gn_quadratic(self, p: Tangent):                  # ‖𝒥 Π p‖²  (+ ⟨p, H_R p⟩) -- the Cauchy denominator