Umaswati also known as Umaswami was the chief disciple of Acharya Kundakunda. He is the author of Tattvartha Sutra, which is considered one of the most important Jain text. 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 conferred with the title of Acharya. The word Acharya is a title prefixed to the names the Jain spiritual leaders who are considered as one of the panch parmeshti's as per Navkar Mantra.