Umaswati also known as Umaswami was the chief disciple of Acharya Kundakunda. He is the author of Tattvartha Sutra (that which is), which is one of the most important Jain texts. He is claimed by both the Digambara and Svetambara sects as their own. A mathematician, he lived in the 2nd century AD. It is likely that at this time no clear division of the Jain community had emerged, and thus both sects may be right in claiming him. He was a Acharya (head of the monastic order). Acharyas are one of the Pañca-Parameṣṭhi (five supreme beings).