ut3_entries_corewise_transpose

t3toolbox.backend.ut3_sampling.ut3_entries_corewise_transpose(c, index, data, sum_over_probes=False)

def ut3_entries_corewise_transpose(
        c:     NDArray,    # residual, shape=W+K+C
        index: NDArray,    # int, shape=(d,)+W (the indices c weights)
        data:  UT3Data,
        sum_over_probes: bool = False,
) -> typ.Tuple[NDArray, NDArray]:     # (tucker-core grad supercore, tt-core grad supercore)

Corewise transpose of ut3_entries(): gradient w.r.t. the frame supercores (index unpacked – the one-hot vectors are built packed inside entries._onehot_vectors).

Parameters:

• c (NDArray)

• index (NDArray)

• data (UT3Data)

• sum_over_probes (bool)

Return type:

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