CorewiseGeometryOps.retract
===========================

.. py:method:: t3toolbox.backend.geometry.CorewiseGeometryOps.retract(frame, variations, aux=None)

   .. code-block:: python

      def retract(self, frame, variations, aux=None):


   The additive retraction ``(U, G) += variations`` (mean-tied first when shared, which keeps
   tied-in giving tied-out; the group's factors come back as one aliased array).