ut3_probe_corewise_transpose

t3toolbox.backend.ut3_sampling.ut3_probe_corewise_transpose(ztildes, ww, data, sum_over_probes=False)

def ut3_probe_corewise_transpose(
        ztildes: typ.Sequence[NDArray],  # probe residuals, len=d, ith elm_shape=W+K+C+(Ni,)
        ww:      typ.Sequence[NDArray],  # probe vectors,   len=d, ith elm_shape=W+(Ni,)
        data:    UT3Data,
        sum_over_probes: bool = False,
) -> typ.Tuple[NDArray, NDArray]:     # (tucker-core grad supercore, tt-core grad supercore)

Corewise transpose of ut3_probe(): gradient w.r.t. the frame supercores. ztildes and ww packed to N.

Parameters:

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

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

• data (UT3Data)

• sum_over_probes (bool)

Return type:

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