A celebrated astronomer and mathematician, Bhāskarācārya (A. D. 1114-1160) wrote the monumental work *Siddhānta-śiromaṇi* when he was only 36. It has four chapters of which the first—called *Līlāvatī—*is on arithmetic. The story goes that he named this part of his work after his daughter Līlāvatī who was widowed at an early age, to immortalize her. An extremely popular work written in an interesting and entertaining manner, it has been translated into several languages over the centuries. It includes sections on śūnya or zero, geometry, mensuration, and kuṭṭaka or indeterminate equations of the first magnitude. *Bījagaṇita* or algebra is the second chapter. The other two chapters called *Gaṇitādhyāya* and *Golādhyāya* are works on astronomy that include celestial mathematics.

The work has several commentaries in Sanskrit.

Another work of his, called *Kāraṇa-kutūhala*, a handbook for preparing astronomical tables, is not so well-known.