World Library  
Flag as Inappropriate
Email this Article
 

Jyeṣṭhadeva

Jyeṣṭhadeva
Born c. 1500 CE
Died c. 1575 CE
Residence Alattur, near Tirur in Kerala
Nationality Indian
Ethnicity Namputiri
Occupation Astronomer-mathematician
Known for Authorship of Yuktibhāṣā
Notable work Yuktibhāṣā, Drkkarana
Religion Hindu
Relatives Parangngottu (Sanskritised as Parakroda) family
Notes
Pupil of Damodara, contemporary of Nilakantha Somayaji, teacher of Achyuta Pisharati

Jyeṣṭhadeva (Malayalam: ജ്യേഷ്ഠദേവന്‍) (c. 1500 – c. 1575)[1][2] was an astronomer-mathematician of the Kerala school of astronomy and mathematics founded by Sangamagrama Madhava (c. 1350 – c. 1425). He is best known as the author of Yuktibhāṣā, a commentary in Malayalam of Tantrasamgraha by Nilakantha Somayaji (1444–1544). In Yuktibhāṣā, Jyeṣṭhadeva had given complete proofs and rationale of the statements in Tantrasamgraha. This was unusual for traditional Indian mathematicians of the time. An analysis of the mathematics content of Yuktibhāṣā has prompted some scholars to call it "the first textbook of calculus".[3] Jyeṣṭhadeva also authored Drk-karana a treatise on astronomical observations.[4]

Contents

  • Life period of Jyeṣṭhadeva 1
  • Mathematical lineage 2
  • Jyeshthadeva's works 3
  • See also 4
  • References 5
  • Further references 6

Life period of Jyeṣṭhadeva

There are a few references to Jyeṣṭhadeva scattered across several old manuscripts.[1] From these manuscripts, one can deduce a few bare facts about the life of Jyeṣṭhadeva. He was a Nambudiri belonging to the Parangngottu family (Sanskrtised as Parakroda) born about the year 1500 CE. He was a pupil of Damodara and a younger contemporary of Nilakantha Somayaji. Achyuta Pisharati was a pupil of Jyeṣṭhadeva. In the concluding verse of his work titled Uparagakriyakrama, completed in 1592, Achyuta Pisharati has referred to Jyeṣṭhadeva as his aged benign teacher. From a few references in Drkkarana, a work believed to be of Jyeṣṭhadeva, one may conclude that Jyeṣṭhadeva lived up to about 1610 CE.

Parangngottu, the family house of Jyeṣṭhadeva, still exists in the vicinity of Trikkandiyur and Alathiyur.[1] There are also several legends connected with members of Parangngottu family.

Mathematical lineage

Little is known about the mathematical traditions in Kerala prior to Sangamagrama Madhava. Vatasseri Paramesvara was a direct disciple of Madhava. Damodara was a son of Paramesvara. Nilakantha Somayaji and Jyeshthadeva were pupils of Damodara. Jyeṣṭhadeva's pupil was Achyuta Pisharati and Melpathur Narayana Bhattathiri was Achyuta Pisharati's student.

Jyeshthadeva's works

Jyeṣṭhadeva is known to have composed only two works, namely, Yuktibhāṣā and Drkkarana. The former is commentary with rationales of Tantrasamgraha of Nilakantha Somayaji and the latter is a treatise on astronomical computations.

Three factors make Yuktibhāṣā unique in the history of the development of mathematical thinking in the Indian subcontinent:

  • It is composed in the spoken language of the local people, namely, the Malayalam language. This is in contrast to the centuries old Indian tradition of composing scholarly works in the Sanskrit language which was the language of the learned.
  • The work is in prose, again in contrast to the prevailing style of writing even technical manuals in verse. All the other notable works of the Kerala school are in verse.
  • Most importantly, Yuktibhāṣā was composed intentionally as a manual of proofs. The very purpose of writing the book was to record in full detail the rationales of the various results discovered by mathematicians-astronomers of the Kerala school, especially of Nilakantha Somayaji. This book is proof enough to establish that the concept of proof was not unknown to Indian mathematical traditions.

See also

References

  1. ^ a b c  
  2. ^ http://www-history.mcs.st-andrews.ac.uk/Biographies/Jyesthadeva.html
  3. ^ P.P. Divakaran, P. P. (December 2007). "The First Textbook of Calculus: Yuktibhāṣā". Journal of Indian Philosophy (Springer Netherlands) 35 (5–6): 417–443.  
  4. ^ J J O'Connor and E F Robertson (November 2000). "Jyesthadeva". School of Mathematics and Statistics University of St Andrews, Scotland. Retrieved 28 January 2010. 

Further references

  • Details on the English translation of (This is a critical translation of the original Malayalam text by K.V. Sarma with explanatory notes by K. Ramasubramanian, M.D. Srinivas and M.S. Sriram.)  
  • For a review of the English translation of  
  • R.C. Gupta (1973). "Addition and subtraction theorems for the sine and the cosine functions in medieval india" (PDF). Indian Journal of History of Science 9 (2): 164–177. 
  •  
  •  
  • George Gheverghese Joseph (2000). The Crest of the Peacock: The Non-European Roots of Mathematics. Princeton University Press. p. 416.  
  • Plofker, Kim (2009). "7 The school of Madhava in Kerala". Mathematics in India. Princeton University Press. pp. 219–254. 
  • For a modern explanation of Jyeṣṭhadeva's proof of the power series expansion of the arctangent function: Victor J. Katz. "12". A history of mathematics: An introduction (3 ed.). 2009: Addison Wesley. pp. 450–455.  
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.