Library
Texts library: Siddhanta
A catalogue of the classical texts behind the Vedic sciences: what each one covers, how it is arranged, and the editions and translations to read it in.
Sūryasiddhānta
सूर्यसिद्धान्त
The best-known Indian treatise on mathematical astronomy, giving the long time cycles, mean and true planetary motions, eclipses, conjunctions, instruments and cosmography. Many traditional panchangas long computed from its parameters. The surviving text is not identical to the version known to Varahamihira.
- Author
- Anonymous; presented as revealed by the Sun
- Period
- An early version was summarised by Varahamihira (6th century); the extant text reflects later revision (dating debated)
- Tradition
- Siddhanta
Āryabhaṭīya
आर्यभटीय
A short and dense work in four parts covering an alphabetic number code, mathematics, time-reckoning and spherical astronomy. It proposes the daily rotation of the earth and gives a sine table and methods for planetary computation. It shaped the Aryabhata school, which later flourished in Kerala.
- Author
- Aryabhata
- Period
- 499 CE (the author states his age in relation to that year)
- Tradition
- Siddhanta
Siddhāntaśiromaṇi
सिद्धान्तशिरोमणि
Bhaskara's comprehensive treatise in four parts: Lilavati (arithmetic), Bijaganita (algebra), Grahaganita (planetary mathematics) and Goladhyaya (the sphere). Bhaskara wrote his own commentary, the Vasanabhashya, explaining the reasoning. It was among the most studied astronomical works in later centuries.
- Author
- Bhaskara II (Bhaskaracharya)
- Period
- 1150 CE
- Tradition
- Siddhanta