ManifoldGeometryOps.base_point
==============================

.. py:method:: t3toolbox.backend.geometry.ManifoldGeometryOps.base_point(frame)

   .. code-block:: python

      def base_point(
              self,
              frame:  typ.Tuple,   # (U, O, P, Q)
      ) -> typ.Tuple:              # (tucker_cores, tt_cores) = (U, P) -- the tensor the frame is attached to


   The point ``X = (U, P)`` the frame is attached to. What a frame *is* belongs to the geometry,
   so consumers (the regularizer, diagnostics) ask for the point rather than indexing the tuple.