Atmatattvaviveka (also written as Atma Tattva Viveka) is a Nyaya text by Udayanacharya (1050 – 1100 CE). Atmatattvaviveka was published in the Bibliotheca Indica Edition, Calcutta (now Kolkata) in 1939. A summary of the work by V Varadacari was published in Encyclopedia of Indian Philosophies, Vol. II, edited by K.H.Potter. Udayanacharya was born in the village of Kariona in Mithila and was a dynamic acharya in the Nyaya system of philosophy. He entered into philosophical disputations with the Vedic, non-Vedic and Buddhist scholars. Atmatattvaviveka has a two-fold aim of refuting Buddhist arguments against the theory of eternity of atman (the self) and of establishing the eternity of the self by an erudite survey and examination of the limitations of the theory of momentariness. Atmatattvaviveka is divided into four sections. Kshana Bhangavada – This deal with the Buddhist theory – according to which whatever exists is momentary. Udayana shows the logical, epistemological and pr...