Daniel Sion Kubert (/ˈkjuːbərt/; October 18, 1947[1] – January 5, 2010[2]) was an American mathematician who introduced modular units and Kubert identities.

He grew up in a secular Jewish family in Elkins Park, Pennsylvania, the son of David Kubert, an attorney, and Adele (Sion) Kubert, a high school teacher. Daniel graduated from Philadelphia's Central High School in 1965. Kubert graduated from Brown University in 1969, receiving B.S. and M.A. degrees in the same year.[1][3] He received his Ph.D. in mathematics from Harvard University in 1973,[4] where his dissertation "Universal Bounds on the Torsion and Isogenies of Elliptic Curves" was supervised by Barry Mazur.

Kubert served as a Gibbs Instructor at Yale University from 1973 to 1975.[1] His work on modular units was done in collaboration with Yale mathematician Serge Lang. Kubert was hired as an assistant professor at Cornell University in 1975,[1] and was still there at the end of the decade.[5] By the early 1980s, Kubert was at the University of Pennsylvania.[6] He also had two stints at the Institute for Advanced Study, in 1979–80 and 1984–85.[4]

In later life, Kubert was a resident of Philadelphia.[2]

Selected publications

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  • Kubert, Daniel S.; Lang, Serge (1981), Modular units, Grundlehren der Mathematischen Wissenschaften [Fundamental Principles of Mathematical Science], vol. 244, Berlin, New York: Springer-Verlag, ISBN 978-0-387-90517-4, MR 0648603, Zbl 0492.12002
  • Kubert, Dan; Lang, Serge (1975), "Units in the modular function field. I", Mathematische Annalen, 218 (1): 67–96, doi:10.1007/BF01350068, ISSN 0025-5831, MR 0437496, S2CID 177788984, Zbl 0311.14005

References

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  1. ^ a b c d Annual Report 1979/80 (PDF). Princeton, New Jersey: Institute for Advanced Study. p. 42.
  2. ^ a b "Obituary: Daniel Kubert". The Philadelphia Inquirer. January 8, 2010.
  3. ^ "Theses & Dissertations". Brown University Library. Retrieved August 3, 2024.
  4. ^ a b "Daniel Kubert". Institute for Advanced Study. Retrieved 7 February 2018.
  5. ^ Author credits, Bulletin de la S. M. F., tome 107 (1979), p. 161.
  6. ^ Grants and Awards for Fiscal Year 1982. National Science Foundation. p. 26.
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