ManifoldGeometryOps.point_norm_sq
=================================

.. py:method:: t3toolbox.backend.geometry.ManifoldGeometryOps.point_norm_sq(x_cores)

   .. code-block:: python

      def point_norm_sq(self, x_cores):


   ``‖X‖²_HS`` -- the regularizer's objective term; **per-element over the stack ``C``**
   (shape = ``C``, a 0-d scalar unstacked). Exact for ANY point: left-orthogonalizes first
   (Tucker up-orth + one left TT sweep, no ``W`` factor -- negligible beside the misfit evaluation it
   always sits next to), then reads ``‖last TT core‖²``. The uniform twin does the same. The check-free
   fast path for a point known to be left-orthogonal is :py:func:`t3_left_orthogonal_norm_sq`.