Pandita Jagannatha Samrat (1652–1744) was an Indian astronomer and mathematician in the court of Jai Singh II of Amber. He learned Arabic and Persian in order to study Islamic astronomy. His works include Rekhaganita, a translation of Euclid's Elements made from Nasir al-Din al-Tusi's Arabic recension of same; Siddhantasarakaustubha, a translation of the Almagest from Arabic; and two works on astronomical instruments such as the astrolabe, Siddhanta-samrat and Yantraprakara, which also record astronomical observations made by Jagannatha.
- K. V. Sarma. "Jagannatha Samrat." In Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures, ed. Helaine Selin, pp. 460-61. Dordrecht: Kluwer Academic Publishers, 1997. ISBN 978-0-7923-4066-9.
- Harilal Harshadarai Dhruva. "The Rekhaganita or Geometry in Sanskrit", pp. 35 ff. Bombay: Bombay Sanskrit Series, no. LXI, 1901.
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