Person · mathematician & author · India
Jyeshthadeva
Also known as Jyeshthadeva — Yuktibhasa
The 16-century Kerala school mathematician Jyeshthadeva (c.1500-c.1575), author of the Yuktibhasa (c.1530) — a Malayalam-language exposition of Kerala school mathematics with the first known systematic demonstrations (proofs) of results that had earlier been stated only axiomatically in Sanskrit treatises. The Yuktibhasa presents proofs for the Madhava-Leibniz series for pi, the Madhava-Newton infinite series for sine and cosine, the arctangent series, and the algorithms for calculating planetary positions. The use of Malayalam vernacular (rather than Sanskrit) for mathematical demonstration is unique in the Indian mathematical tradition and provides unusually clear access to the Kerala school's reasoning. The Yuktibhasa was first studied by C.M. Whish in 1832 and systematically analysed by K.V. Sarma in the 1970s, establishing the Kerala school's priority in several results.
- Date
- 1500–1610
- Function
- Science & medicine
- Condition
- historical person
- Confidence
- Established / referenced
- Location
- 10.500, 76.250
About the place
Placed in central Kerala near Alathiyur, the village of the Parangottu family to which he belonged and where he wrote the Yuktibhasa — the first mathematical work in an Indian vernacular.
Connections (2)
- Canonised by textSangamagrama
The Yuktibhāshā is written in Malayalam, not Sanskrit, and gives derivations rather than results — which makes it the earliest text anywhere that does mathematics the way a modern textbook does. Whether the Kerala results reached Europe through Jesuit missionaries in Kochi is argued about and unresolved; what is certain is that the work was done, and written down, two centuries before Newton.
- Teaching lineageNīlakantha Somayāji
Nīlakantha wrote in Sanskrit and his successor Jyeshthadeva wrote the Yuktibhāshā in Malayalam within a generation, which is the moment a vernacular was judged capable of carrying technical mathematics — proofs, derivations, infinite series. It is the clearest recorded instance in India of a spoken language being deliberately promoted into a scientific medium, and it happened two centuries before any European language managed the same.
On these journeys
- Mathematics and astronomy — Kusumapura to Sangamagrama
- Knowledge networks — how ideas moved
- The making of Indian languages and scripts
Sources
Yuktibhasa manuscript scholarship; K.V. Sarma and later editions/translations.
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