Anūnatvāpurnatvanirdeśa
The Anūnatvāpūrṇatvanirdeśaparivarta (AAN, Sanskrit, The Chapter on the Teaching of Neither Deficiency Nor Fullness), also known as the Sutra of Non-increase and Non-decrease (Chinese: 不增不減經) is a short Mahayana text belonging to the tathāgatagarbha class of Mahayana sutras. The main topic of the sutra is the nature of the Buddhist cosmos (the "realm of sentient beings", Skt.