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Veṇvāroha is a work in Sanskrit composed by Mādhava (c.1350 – c.1425) of Sangamagrāma the founder of the Kerala school of astronomy and mathematics. It is a work in 74 verses describing methods for the computation of the true positions of the Moon at intervals of about half an hour for various days in an anomalistic cycle. This work is an elaboration of an earlier and shorter work of Mādhava himself titled ''Sphutacandrāpti''. ''Veṇvāroha'' is the most popular astronomical work of Mādhava. It is dated 1403 CE. Acyuta Piṣārati (1550–1621), another prominent mathematician/astronomer of the Kerala school, has composed a Malayalam commentary on ''Veṇvāroha''.〔 This astronomical treatise is of a type generally described as Karaṇa texts in India. Such works are characterized by the fact that they are compilations of computational methods of practical astronomy. The title ''Veṇvāroha'' literally means Bamboo Climbing and it is indicative of the computational procedure expounded in the text. The computational scheme is like climbing a bamboo tree, going up and up step by step at measured equal heights. The novelty and ingenuity of the method attracted the attention of several of the followers of Mādhava and they composed similar texts thereby creating a genre of works in Indian mathematical tradition collectively referred to as ‘veṇvāroha texts’. These include ''Drik-veṇvārohakriya'' of unknown authorship of epoch 1695 and ''Veṇvārohastaka'' of Putuman Somāyaji. In the technical terminology of astronomy, he ingenuity introduced by Mādhava in ''Veṇvāroha'' can be explained thus: Mādhava has endeavored to compute the true longitude of the Moon by making use of the true motions rather than the epicyclic astronomy of the Aryabhatan tradition. He made use of the anomalistic revolutions for computing the true positions of the Moon using the successive true daily velocity specified in ''Candravākyas'' for easy memorization and use. Veṇvāroha has been studied from a modern perspective and the process is explained using the properties of periodic functions. ==See also== *Indian mathematics *Indian mathematicians *Kerala school of astronomy and mathematics *Madhava of Sangamagrama 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Venvaroha」の詳細全文を読む スポンサード リンク
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