Author: Dzogchen Ponlop Rinpoche, Acharya Lama Tenpa Gyaltsen, and Acharya Kelsang Wangdi Translator: Karl Brunnhölzl
A root text written by Dzogchen Ponlop Rinpoche, Acharya Lama Tenpa Gyaltsen, and Acharya Kelsang Wangdi. It presents the divisions and definitions of the Vaibhashika and Sautrantika philosophical systems.