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Adjunct Associate Professor (Retired)
Geometry, history of mathematics, educational mathematics, automata theory
- Crocheting Adventures with Hyperbolic Planes: Tactile Mathematics, Art and Craft for all to Explore, Second Edition, CRCPress, 2018.
- Crocheting Algorithms (with Giesela Baurman), The Cornell Journal of Architecture, 9: Mathematics, 2012, pp. 105-112
- Crocheting Adventures with Hyperbolic Planes, AK Peters, 2009. (Winner of the 2012 Euler Prize from the Mathematical Association of America)
- Concrete models and dynamic instruments as early technology tools in classrooms at the dawn of ICMI: from Felix Klein to present applications in mathematics classrooms in different parts of the world (with Maria G. Bartolini-Bussi and Masami Isoda), ZDM The International Journal on Mathematics Education, vol. 42, No.1, February 2010, pp. 19-31.