ufv_kronecker_weights
=====================

.. py:function:: t3toolbox.backend.ufv_operations.ufv_kronecker_weights(weights_A, weights_B)

   .. code-block:: python

      def ufv_kronecker_weights(
              weights_A: UT3FrameWeightsData,
              weights_B: UT3FrameWeightsData,
      ) -> UT3FrameWeightsData:  # per-family Kronecker: padded widths multiply, masks Kronecker


   Per-edge Kronecker product of two frame-weight 4-tuples (the Hadamard combine; ranks multiply).

   Kronecker the weights, Kronecker the masks -- one operation applied twice, since the Kronecker product
   commutes with elementwise multiply (see ``ut3_kronecker_weights`` for the argument). A **last-axis
   outer product broadcasting the shared prefix**, A-major -- NOT ``np.kron``. Output masks are strided
   (gappy), which is correct.