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**Peter J. Freyd** (born 5 February 1936, Evanston, Illinois)^{[1]} is an American mathematician, a professor at the University of Pennsylvania, known for work in category theory and for founding the False Memory Syndrome Foundation.

Freyd is perhaps best known as the author of the foundational book *Abelian Categories: An Introduction to the Theory of Functors*. This work culminates in a proof of Mitchell's embedding theorem.

In 2012 he became a fellow of the American Mathematical Society.^{[2]}

Freyd and his wife Pamela founded the False Memory Syndrome Foundation in 1992,^{[3]} after Freyd was accused of sexual abuse by his daughter Jennifer.^{[3]}^{[4]} Freyd denies the accusations.^{[5]}

- Ph.D. Princeton University 1960.

- Peter J. Freyd,
*Abelian Categories, an Introduction to the Theory of Functors*. Harper & Row (1964). Available online. - Peter J. Freyd and Andre Scedrov:
*Categories, Allegories*. North-Holland (1999). ISBN 0-444-70368-3. - Peter J. Freyd: Path Integrals, Bayesian Vision, and Is Gaussian Quadrature Really Good? Electr. Notes Theor. Comput. Sci. 29: (1999)
- Peter J. Freyd, Peter W. O'Hearn, A. John Power, Makoto Takeyama, R. Street, Robert D. Tennent: Bireflectivity. Theor. Comput. Sci. 228(1–2): 49–76 (1999)

**^***American Men and Women of Science*, Thompson Gale, 2005**^**List of Fellows of the American Mathematical Society, retrieved 2012-12-29.- ^
^{a}^{b}Diana E. H. Russell.*The Secret Trauma: Incest in the Lives of Girls and Women*. Basic Books, 1987. xx–xxi. **^**Freyd, J. (1996)*Betrayal Trauma: The Logic of Forgetting Child Abuse.*Cambridge, MA: Harvard University Press. The history of the confrontations between the Freyds and their daughter Jennifer is recounted in the Afterword, pages 197–199.**^**"One family's tragedy spawns national group",*The Baltimore Sun*, 12 Sept 1994. Available on the web at Skeptic Files

- Peter J. Freyd at the Mathematics Genealogy Project
- Printable versions of Abelian categories, an introduction to the theory of functors.

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