Lalla ( 720–790 CE) was an Indian mathematician, astronomer, and astrologer who belonged to a family of astronomers. Lalla was the son of Trivikrama Bhatta and the grandson of Śâmba. He lived in central India, possibly in the Lāṭa region in modern south Gujarat. Lalla was known as being one of the leading Indian astronomers of the eighth century.
His best-known work is the Śiṣyadhīvṛddhidatantra ("Treatise which expands the intellect of students"). This text is one of the first major Sanskrit astronomical texts known from the period following the 7th-century works of Brahmagupta and Bhāskara I.
He followed the Āryapakṣa or the school of Āryabhaṭa (continued by Bhāskara I), but divided the mahāyuga in the traditional way, following the Brāhmapakṣa school
of Brahmagupta.
Works
- Śiṣyadhīvṛddhidatantra: The most extensive extant exposition of the views of the Āryapaksa school. It contains twenty-two chapters divided into two books:
- A commentary on Brahmagupta's Khandakhadyaka, now lost