ManifoldGeometryOps.retract
===========================

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

   .. code-block:: python

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


   The manifold retraction: shift the doubled-rank embedding and truncate back to the frame
   ranks (the grouped ``t3svd`` when shared).