t3_add
======

.. py:function:: t3toolbox.backend.t3_linalg.t3_add(x, y)

   .. code-block:: python

      def t3_add(
              x: typ.Tuple[typ.Sequence[NDArray], typ.Sequence[NDArray]], # (tucker_cores_x, tt_cores_x)
              y: typ.Tuple[typ.Sequence[NDArray], typ.Sequence[NDArray]], # (tucker_cores_y, tt_cores_y)
      ) -> typ.Tuple[
          typ.Tuple[NDArray, ...],  # x_plus_y tucker_cores
          typ.Tuple[NDArray, ...],  # x_plus_y tt_cores
      ]:


   Add Tucker tensor trains x and y, yielding a Tucker tensor train with summed ranks.