It has been pointed out in Schmithausen 1967
(i.e. “Sautrāntika-Voraussetzungen in Viṃśatikā und Triṃśikā”) that
the idealism in Vasubandhu’s Viṃśatikā has not been developed
on the basis of the Yogācāra’s concept of the “eightfold complex of mental
series” (i.e. rnam shes tshogs brgyad) but on the basis of
the Sautrāntika concept of the “one-layered mental series.” Such an
idealism developed on the basis of the “one-layered mental series” of
the Sautrāntikas can also be found in Dignāga’s Ālambanaparīkṣā and
Dharmakīrti’s writings. The idealism in Vasubandhu’s Triṃśikā,
however, has been developed on the basis of the Yogācāra’s concept of the
eightfold complex of mental series.
