Nira (Richter) Dyn (Hebrew: נירה דין; born 1942) is an Israeli mathematician who studied geometric modeling, subdivision surfaces, approximation theory, and image compression. She is a professor emeritus of applied mathematics at Tel Aviv University,^[1] and has been called a "pioneer and leading researcher in the subdivision community".^[2]

Dyn earned a bachelor's degree from the Technion – Israel Institute of Technology in 1965. She went on to graduate study at the Weizmann Institute of Science, where she earned a master's degree in 1967 and completed her doctorate in 1970.^[1] Her dissertation, Optimal and Minimum Norm Approximations to Linear Functionals in Hilbert Spaces, and their application to Numerical Integration, was supervised by Philip Rabinowitz.^[3] After postdoctoral research in the Institute of Fundamental Studies at the University of Rochester, she joined the Tel Aviv faculty in 1972, and retired in 2010.^[1]

Dyn was an invited speaker at the 2006 International Congress of Mathematicians, in the section on numerical analysis and scientific computing.^[4]

Dyn is the author of:

• Stochastic Models in Biology (as Nira Richter-Dyn, with Narendra S. Goel, Academic Press, 1974)^[5]
• Approximation of Set-valued Functions: Adaptation of Classical Approximation Operators (with Elza Farkhi and Alona Mokhov, Imperial College Press, 2014)^[6]

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