Jean Ecalle Chercheur au CNRS (D.R. émerite, né le 05/03/1947) Equipe d'Analyse Harmonique Institut de Mathématiques d'Orsay Université Paris-Saclay 91405 Orsay Cedex - France  Email :   jean.ecalle@universite-paris-saclay.fr   jeanecalle64@gmail.com  Office room : 2J3  Phone : 33 (0) 1 69 15 57 28 Main research themes. Main publications. Guided tour through resurgence theory. Some conference related slides. Updates on the flexion structure and ARI-GARI. Former PhD students.