ut3_sqrt_weights
================

.. py:function:: t3toolbox.backend.ut3_operations.ut3_sqrt_weights(weights)

   .. code-block:: python

      def ut3_sqrt_weights(
              weights: UT3WeightsData,  # (tucker_weight_supercore, tt_weight_supercore, masks)
      ) -> UT3WeightsData:              # sqrt(w) on the real slots; padding a canonical, finite 0; masks unchanged


   Elementwise ``sqrt`` on the real slots (masks unchanged). The padding is neutralized rather than
   square-rooted: ``sqrt`` is fine at the canonical ``0`` but not differentiable there (an ``inf``
   gradient), and garbage padding can be negative (``nan``). See :py:func:`_ut3_map_real_weights`.