Which school did Brahmagupta attended?

Brahmagupta, the ancient Indian mathematician and astronomer, is believed to have studied at the prestigious university in Ujjain, which was a significant center for learning in ancient India. However, specific details about his education are not well-documented, and much of what we know about him comes from his own writings rather than historical records of his schooling. His most famous work, the "Brahmasphutasiddhanta," reflects his knowledge and contributions to mathematics and astronomy.