utv_apply_derivatives
=====================

.. py:function:: t3toolbox.backend.utv_sampling.utv_apply_derivatives(ww, pp, frame_data, variations_data, order)

   .. code-block:: python

      def utv_apply_derivatives(
              ww,               # apply vectors X,        len=d, ith elm_shape=W+(Ni,)
              pp,               # perturbation vectors P, len=d, ith elm_shape=W+(Ni,)
              frame_data,       # UT3Frame .data
              variations_data,  # UT3Variations .data
              order,            # highest derivative order
      ):  # -> scalar jets, shape=(order+1,)+W+K+C


   Symmetric all-modes apply derivatives of a uniform tangent vector (the bare ``𝒥``; a scalar jet per
   stack element).