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Daniel Bennequin
Daniel Bennequin (3 January 1952) is a French mathematician, known for the Thurston–Bennequin number (sometimes called the Bennequin number) introduced in his doctoral dissertation.〔(Maximal Thurston-Bennequin number - Knot Atlas )〕
==Education and career==
Bennequin completed his secondary education at Lycée Condorcet and then graduated from the École normale supérieure. He received his habilitation (Doctoral d'Etat) in 1982 from the University of Paris VII under Alain Chenciner with thesis ''Entrelacements et équations de Pfaff''.〔 (Bennequin's doctoral dissertation)〕 He was a professor at the University of Strasbourg before becoming a professor at the University of Paris VII (Institut Mathématique de Jussieu).
Bennequin's dissertation was a major contribution to contact geometry, in which he gave the first example of an exotic contact structure embedded in Euclidan 3-space. On the basis of their work in the 1980s Bennequin and Yakov Eliashberg might be considered the founders of contact topology.〔Adrien Douady: ''Noeuds et structures de contact en dimension 3, d'après Daniel Bennequin'', Seminaire Bourbaki 604, 1982/83, (numdam )〕 Bennequin also works on motion planning. He was a member of Bourbaki.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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