ut3_entries_corewise_derivatives_transpose

t3toolbox.backend.ut3_sampling.ut3_entries_corewise_derivatives_transpose(c, index, pp, data, order, sum_over_probes=False)

def ut3_entries_corewise_derivatives_transpose(
        c:     NDArray,                # residual jet (scalar), shape=(order+1,)+W+K+C
        index: NDArray,                # int, shape=(d,)+W
        pp:    typ.Sequence[NDArray],  # perturbation vectors P, len=d, ith elm_shape=W+(Ni,)
        data:  UT3Data,
        order: int,
        sum_over_probes: bool = False,
) -> typ.Tuple[NDArray, NDArray]:     # (tucker-core grad supercore, tt-core grad supercore)

Corewise transpose of ut3_entries_derivatives(): gradient w.r.t. the frame supercores (pp packed, index unpacked).

Parameters:

• c (NDArray)

• index (NDArray)

• pp (t3toolbox.backend.common.typ.Sequence[NDArray])

• data (UT3Data)

• order (int)

• sum_over_probes (bool)

Return type:

t3toolbox.backend.common.typ.Tuple[NDArray, NDArray]