|Born||1947 (age 71–72)|
|Alma mater||École normale supérieure de Saint-Cloud|
Paris Diderot University
|Doctoral advisor||Jean-Louis Krivine|
Jean-Yves Girard (French: [ʒiʁaʁ]; born 1947) is a French logician working in proof theory. He is the research director (emeritus) at the mathematical institute of the University of Aix-Marseille, at Luminy.
Jean-Yves Girard is an alumnus of the École normale supérieure de Saint-Cloud.
He made a name for himself in the 1970s with his proof of strong normalization in a system of second-order logic called System F. This result gave a new proof of Takeuti's conjecture, which was proven a few years earlier by William W. Tait, Motō Takahashi and Dag Prawitz. For this purpose, he introduced the notion of "reducibility candidate" ("candidat de réducibilité"). He is also credited with the discovery of Girard's paradox, linear logic, the geometry of interaction, ludics, and the mustard watch.
- Ernest Nagel; James R. Newman; Kurt Gödel; Jean-Yves Girard (1989). Le théorème de Gödel. Éditions du Seuil.
- Jean-Yves Girard; P. Taylor; Yves Lafont (1989). Proofs and Types. Cambridge University Press.
- Jean-Yves Girard (2007). Le Point Aveugle, Cours de Logique. Hermann.
- Jean-Yves Girard (2016). Le fantôme de la transparence. Éditions Allia.
- Ringard, Yann-Joachim (1990). "Mustard watches: an integrated approach to time and food". Retrieved 27 May 2018.
- Girard's home page
- Jean-Yves Girard at the Mathematics Genealogy Project
- Girard's bibliography (via DBLP)
- Journées Jean-Yves Girard web site of 2007 conference in honour of Girard's 60th birthday
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