Dignaga (Skt. Dignāga; Tib. ཕྱོགས་ཀྱི་གླང་པོ་, Wyl. phyogs kyi glang po; Tib. chok kyi langpo) (circa 6th century AD) was one of the six great commentators (the ‘Six Ornaments’) on the Buddha’s teachings. He was one of the four great disciples of Vasubandhu who each surpassed their teacher in a particular field. Dignaga was more learned than Vasubandhu in pramāṇa. His reputation as unequalled in debate was cemented through his celebrated victory over the brahmin named Sudurjaya at Nālandā monastery.
Among his disciples was Iśvarasena, who later became the teacher of Dharmakīrti.
His early (extant) works were:
- The Abhidharmakośa-marma-pradīpa - a condensed summary of Vasubandhu's seminal work
- A brief summary of the Aṣṭasāhasrika-prajñāpāramitā sūtra
His remaining works were all pertaining to logic:
- Compendium of Valid Cognition (Pramāṇa-samuccaya), which was a condensation of all these works
- Hattori, Masaaki. Dignāga, On Perception. Cambridge, Harvard University Press, 1968.
- Hayes, Richard P. Dignāga on the Interpretation of Signs. Dordrecht, Netherlands: Kluwer, 1988.
- Douglas Duckworth, Malcolm David Eckel, Jay L. Garfield, John Powers, Yeshes Thabkhas, Sonam Thakchoe, Dignaga's Investigation of the Percept: A Philosophical Legacy in India and Tibet, Oxford University Press, 2016, ISBN 978-0190623708