utv_entries_derivatives

t3toolbox.backend.utv_sampling.utv_entries_derivatives(index, pp, frame_data, variations_data, order)

def utv_entries_derivatives(
        index,            # int array, shape=(d,)+W -- the multi-indices
        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 entry derivatives of a uniform tangent vector at index (the bare 𝒥; fiber slicing, so only pp is packed).