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Author Nilakantha Somayaji, 1444-1545.
Title Tantrasangraha. English & Sanskrit
Tantrasangraha of Nilakantha Somayaji / by K. Ramasubramanian, M.S. Sriram.
Imprint London : Springer, 2011.

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Author Nilakantha Somayaji, 1444-1545.
Series Sources and Studies in the History of Mathematics and Physical Sciences
Sources and studies in the history of mathematics and physical sciences.
Subject Hindu astronomy -- Early works to 1800.
Alt Name Ramasubramanian, K.
Sriram, M. S.
Description 1 online resource (xlvi, 595 pages) : illustrations.
polychrome rdacc
Bibliography Note Includes bibliographical references and index.
Note Text of Tantrasangraha in Sanskrit (Devanagari and roman); translation, explanation and introductory matter in English.
Contents Mean longitudes of planets -- True longitudes of planets -- Gnomonic shadow -- Lunar eclipse -- Solar eclipse -- Vyatipata -- Reduction to observation -- Elevation of lunar horns -- Appendices.
Summary Tantrasangraha, composed by the renowned Kerala astronomer Nilakantha Somayaji (c. 1444–1545 CE) ranks along with Aryabhatiya of Aryabhata and Siddhantasiromani of Bhaskaracarya as one of the major works that significantly influenced further work on astronomy in India. One of the distinguishing features of this text is the introduction of a major revision of the traditional planetary models which includes a unified theory of planetary latitudes and a better formulation of the equation of centre for the interior planets (Mercury and Venus) than was previously available. Several important innovations in mathematical technique are also to be found in Tantrasangraha, especially related to the computation of accurate sine tables, the use of series for evaluating the sine and cosine functions, and a systematic treatment of the problems related to the diurnal motion of the celestial objects. The spherical trigonometry relations presented in the text—applied to a variety of problems such as the computation eclipses, elevation of the moon’s cusps and so forth—are also exact. In preparing the translation and explanatory notes, the authors have used authentic Sanskrit editions of Tantrasangraha by Suranad Kunjan Pillai and K V Sarma. The text consists of eight chapters—mean londitudes, true longitues, gnomonic shadow, lunar eclipse, solar eclipse, vyatipata, reduction to observation and elevation of the moon’s cusps—and 432 verses. All the verses have been translated into English and are supplemented with detailed explanations including all mathematical relations, figures and tables using modern mathematical notation. This edition of Tantrasangraha will appeal to historians of astronomy as well as those who are keen to know about the actual computational procedures employed in Indian astronomy. It is a self-contained text with several appendices included, enabling the reader to comprehend the subject matter without the need for further research.
Note Print version record.
ISBN 9780857290366 (electronic bk.)
0857290363 (electronic bk.)
9780857290359 (cased)
0857290355 (cased)
OCLC # 745003749
Additional Format Print version: Somayaji, Nilakantha, 1444-1545. Tantrasangraha. English & Sanskrit. Tantrasangraha of Nilakantha Somayaji. London : Springer, 2011 9780857290359 (OCoLC)729338766