| From: Thomas Hockey et al. (eds.). The Biographical Encyclopedia of Astronomers, Springer Reference. New York: Springer, 2007, p. 1251 |
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Courtesy of 
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Yativṛṣabha
Setsuro Ikeyama
Flourished Prākrit,
Jadivasaha, (India), 6th century
Little
is known about Yativṛṣabha.
He was a Jain monk who studied under ārya Maṅkṣu and Nāgahastin. He composed,
along with other traditional Jain works, the Tiloyapaṇṇattī (in Sanskrit, Trilokaprajñapti
or Knowledge on the three worlds), a work on Jain cosmography. This work describes
the construction of the Universe expressed in specific numbers; for example,
the diameter of the circular Jambu continent, upon which India is located,
is 100,000 yojanas and its circumference is 316,227 yojanas, 3 krośas,
128 daṇḍas, 13
aṅgulas, 5 yavas, 1
yūkā, 1 ṛikṣā, 6 karmabhūmivālagras,
7 madhyabhogabhūmivālagras, 5 uttamabhogabhūmivālagras,
1 rathareṇu, 3 trasareṇus,
2 sannāsannas, and 3 avasannāsannas, plus a remainder of 23213/105409.
Yativṛṣabha also gives formulas
for computing the circumference (C) and the area (A) of a circle having a
diameter of d:
Selected References
Hayashi, Takao (1993).
Indo no Sūgaku (Mathematics in India).
Chūkō‐shinsho 1155. Tokyo: Chūōkōron‐sha.
Pingree, David
(1976). “Yativrsabha.” In Dictionary of Scientific
Biography, edited by Charles Coulston Gillispie, Vol. 14, pp. 548–549.
New York: Charles Scribner's Sons.
——— (1994). Census of the Exact
Sciences in Sanskrit. Series A. Vol. 5, pp. 319a–320b. Philadelphia: American
Philosophical Society.
Yativṛṣabha (1943–1951).
Tiloyapahnattī, edited by H. Jaina
and A. N. Upādhyāya. Sholapura
(2nd ed. of Vol. 1, Sholapur, 1956). New edition
by V. Mātājī (Vols. 1 and 2 covering
the first four chapters have appeared), Kotā,
1984–1986.