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Vijayanandi or Vijayananda (c. 940, Benares (now Varanasi), India – c. 1010, India) was an Indian mathematician and astronomer who made contributions to trigonometry.

Son of Jayananda, the only known information is that he wrote a work called the Karanatilaka known only from an Arabic translation, Ghurrat al-Zijat , by al-Biruni. There was however another astronomer named Vijayanandi who was referred to by Varahamihira (fl. c. 550) his Pañcasiddhāntikā (XVII, 62) for methods of computing the longitudes of Jupiter and Saturn.

The Karanatilaka includes notes on the units of time, the longitudes of the sun and moon, computation of daylength, eclipse and other such topics.

References

1. Khan, M.S. (1987). "An Examination of Al-Bīrūnī's Knowledge of Indian Astronomy". International Astronomical Union Colloquium. 91: 139–144. doi:10.1017/S0252921100105962. ISSN 0252-9211.
2. O'Connor, John J.; Robertson, Edmund F., "Vijayanandi", MacTutor History of Mathematics Archive, University of St Andrews
3. Sarton, George; Siegel, Frances (1936). "Forty-Sixth Critical Bibliography of the History and Philosophy of Science and of the History of Civilization (To End of February 1936,--With Special Reference to China and Japan)". Isis. 25 (2): 522–613. doi:10.1086/347115. ISSN 0021-1753.

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• 940s births
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• 10th-century Indian astronomers
• 10th-century Indian mathematicians
• 11th-century Indian mathematicians
• 11th-century Indian astronomers
• Scholars from Varanasi
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