Judy Holdener (née Newhauser) is an American mathematician and educator. She is a professor of mathematics at Kenyon College. She was born in 1965. Holdener's primary interest is in number theory. She discovered a simpler proof of the theorem of Touchard, which states that every perfect number is of the form 2k, 12k+1, or 36k+9.

Holdener earned her B.S. in mathematics at Kent State University and her M.S. and Ph.D. in mathematics at the University of Illinois at Urbana-Champaign. Holdener joined the faculty of Kenyon College in 1997, where she is currently the John B. McCoy Distinguished Teaching Chair.

The poem Euler's Daughter by award-winning South African poet Athol Williams is dedicated to Holdener in celebration of her love of mathematics and life.^[1]

• Holdener, J. A. (2002), "A Theorem of Touchard and the Form of Odd Perfect Numbers", American Mathematical Monthly, 109 (7), Mathematical Association of America: 661–663, doi:10.2307/3072433, JSTOR 3072433.
• Touchard, Jacques (1953), "On prime numbers and perfect numbers", Scripta Mathematica, 19: 35–39.

This article incorporates material from Judy Holdener on PlanetMath, which is licensed under the Creative Commons Attribution/Share-Alike License.

• Biography Page at Kenyon College Archived 2020-08-15 at the Wayback Machine