assemble_tangent_z_jets
=======================

.. py:function:: t3toolbox.backend.sampling_derivatives.assemble_tangent_z_jets(tucker_cores, var_tucker_cores, eta_jets, deta_jets)

   .. code-block:: python

      def assemble_tangent_z_jets(
              tucker_cores:       typ.Sequence[NDArray],  # U.  len=d, elm_shape=C+(nUi,Ni)
              var_tucker_cores:   typ.Sequence[NDArray],  # dU. len=d, elm_shape=K+C+(nOi,Ni)
              eta_jets:           typ.Sequence[NDArray],  # len=d, elm_shape=(order+1,)+W+C+(nOi,)
              deta_jets:          typ.Sequence[NDArray],  # len=d, elm_shape=(order+1,)+W+K+C+(nUi,)
      ) -> typ.Tuple[NDArray, ...]:                       # z_jets. len=d, elm_shape=(order+1,)+W+K+C+(Ni,)


   Assemble tangent-probe-derivative jets: ``z_i = U_i deta_i + dU_i eta_i`` -- two lifts
   (``tWCi_Cio_to_tWCo``), the order axis riding as a leading broadcast batch.