Pancasiddhantika is a treatise on astronomy and mathematics written by Varahamihira in the 6th century CE. It is one of the most important works in the history of Indian mathematics.

The Pancasiddhantika is primarily a treatise on astronomy. It discusses topics such as the motion of the planets, eclipses, and the calculation of time.

The Pancasiddhantika discusses five siddhantas, or astronomical systems: Surya Siddhanta, Romaka Siddhanta, Paulisa Siddhanta, and Brhma Siddhanta. The Vasistha Siddhanta is not one of the five siddhantas discussed in the Pancasiddhantika.

The Pancasiddhantika is the first work to discuss the use of algebra in astronomy. It contains a number of algebraic formulas for calculating the positions of the planets and other astronomical objects.

Varahamihira wrote a number of other works besides the Pancasiddhantika, including the Brihat Samhita, the Laghu Jataka, and the Yoga Yatra. The Brihat Samhita is an encyclopedia of various topics, including astronomy, astrology, and architecture. The Laghu Jataka is a treatise on astrology, and the Yoga Yatra is a treatise on yoga.

Varahamihira lived in the 6th century CE.

Varahamihira was a mathematician, astronomer, and astrologer.

Varahamihira was born in Ujjain, India.

Varahamihira died in 587 CE.

Varahamihira's most famous work on astrology is the Brihat Samhita.

Varahamihira's work on yoga is called the Yoga Yatra.

Varahamihira's work on astronomy is called the Pancasiddhantika.

Varahamihira's work on palmistry is called the Laghu Jataka.

Varahamihira's work on architecture is called the Brihat Samhita.

Varahamihira's work on gemology is called the Brihat Samhita.