Just to change the subject, I wonder if Ven Pannasikhara or any learned friends could comment on the origin of the Māhaprajñāparamitopadeśa, a commentary on the Large Prajñāparamita? I always thought it was written by Ven Nagarjuna, until I saw the following text from the Wikipedia:
"Lindtner considers that the Māhaprajñāparamitopadeśa, a huge commentary on the Large Prajñāparamita not to be a genuine work of Nāgārjuna. This is only extant in a Chinese translation by Kumārajīva. There is much discussion as to whether this is a work of Nāgārjuna, or someone else. Étienne Lamotte, who translated one third of the Upadeśa into French, felt that it was the work of a North Indian bhikkhu of the Sarvāstivāda school, who later became a convert to the Mahayana. The Chinese scholar-monk Yin Shun felt that it was the work of a South Indian, and that Nāgārjuna was quite possibly the author. Actually, these two views are not necessarily in opposition, and a South Indian Nāgārjuna could well have studied in the northern Sarvāstivāda. Neither of the two felt that it was composed by Kumārajīva which others have rashly suggested."