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Ranjan Roy received his B.S. degree from I.I.T. Kharagpur and M.S.from I.I.T. Kanpur. He received a full four-year N.S.F. grant to attend SUNY Stony Brook, where he received his Ph.D. degree in 1974. Irwin Kra was the advisor for his thesis on Kleinian groups, making Ranjan a mathematical descendant to Weierstrass and Gauss.

Courses Taught

Ranjan has taught mathematics for forty-five years; he has taught nearly every mathematics course offered at Beloit multiple times.

Many, many of his students have gone on to receive advanced degrees and establish careers in pure and applied mathematics. His teaching and research have always informed one another; he has learned that
the two endeavors are inseparable and that one of the most effective methods for learning a subject is to teach it.

Ranjan Roy

Huffer Professor of Mathematics and Astronomy and Department Chair (Mathematics and Computer Science)

 Email:  Phone: 608-363-2348   Room 216, Sanger Center for the Sciences

Ranjan has published papers in differential equations in the complex domain, Kleinian groups, Riemann surfaces, fluid mechanics, analytic number theory, and the development of mathematics. He regularly referees papers for publication in mathematics journals.

He co-authored three chapters and validated four chapters in the NIST Handbook of Mathematical Functions, a resource used extensively by scientists, engineers, and mathematicians. With Askey and Andrews, Ranjan co-authored Special Functions, published in 1999. His book, Sources in the Development of Mathematics: Series and Products from the Fifteenth to the Twenty-first Century, appeared in 2011; he published Elliptic and Modular Functions in 2017. The second edition of Sources in the Development of Mathematics, in two volumes and entitled Series and Products in the Development of Mathematics, is in production at Cambridge University Press, to appear in 2020.

In 1990, Ranjan’s paper, on the discovery of the series for pi by Leibniz, Gregory, and Nilakantha, earned the MAA Allendoerfer Prize for expository writing. In 1986 and 2000, Ranjan received the Beloit College teaching award; he received the MAA Wisconsin section outstanding teaching award in 2001. In 2002, the Mathematical Association of America awarded Ranjan the Haimo Prize for distinguished teaching of mathematics.

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