sources of which we are not now aware". This is an active area of current research, especially in the manuscript collections of Spain and Maghreb, research that is now being pursued, among other places, at the Centre national de la recherche scientifique in Paris. See also Indian astronomy Indian mathematics Indian mathematicians History of mathematics Notes References . Gupta, R. C. (1969) "Second Order of Interpolation of Indian Mathematics", Indian Journal of History of Science 4: 92-94 . . . Parameswaran, S. (1992) "Whish's showroom revisited", Mathematical Gazette 76, no. 475 pages 28–36 . . . C. K. Raju. 'Computers, mathematics education, and the alternative epistemology of the calculus in the Yuktibhâsâ', Philosophy East and West 51, University of Hawaii Press, 2001. . . Tacchi Venturi. 'Letter by Matteo Ricci to Petri Maffei on 1 Dec 1581', Matteo Ricci S.I., Le Lettre Dalla Cina 1580–1610, vol. 2, Macerata, 1613. External links An overview of Indian mathematics, MacTutor History of Mathematics archive, 2002. Indian Mathematics: Redressing the balance, MacTutor History of Mathematics archive, 2002. Keralese mathematics, MacTutor History of Mathematics archive, 2002. Possible transmission of Keralese mathematics to Europe, MacTutor History of Mathematics archive, 2002. "Indians predated Newton 'discovery' by 250 years" phys.org, 2007 Indian mathematics Schools of mathematics Astronomy in India Hindu astronomy History of mathematics History of Kerala Medieval Kerala Science and technology in Kerala