Jyeṣṭhadeva (fl. 1500–1610) was a Nambūthiri Brahmin from the Ālattūr village, an important Brahmin settlement near Cochin. He was probably a student of Dāmodara, the son of Parameśvara, who also taught Nīlakaṇṭha Somayāji. His fame rests on the authorship of one of the most important texts of the Kerala school of mathematics and astronomy, the Yuktibhāṣā (An Exposition of the Rationale [of mathematics and astronomy]), also called Gaṇita-nyāya-saṇgraha (Compendium of Mathematical Rationale). It is a unique work on the rationale of Hindu mathematics and astronomy as it was understood in medieval India. It is unique in the sense that it is neither a textbook nor a commentary but a work which is wholly devoted to a systematic exposition of mathematical rationale, written in Malayalam, the local language of Kerala.
Born about 1500, Jyeṣṭhadeva probably composed the Yuktibhāṣāabout 1530, since it is known that a little after 1534, Śaṅkara Vāriyar, another contemporary astronomer, used it...
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References
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Sarma, K.V. (2015). Yuktibhāṣā of Jyeṣṭhadeva. In: Selin, H. (eds) Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-3934-5_9608-2
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