Olivier Hénard


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Office: Bureau 40 [Directions
Département de Mathématiques
Bâtiment 425
Faculté des Sciences d'Orsay
Université Paris-Sud
F-91405 Orsay Cedex
France

Phone:   +33 1 69 15 60 17
Fax:        +33 1 69 15 60 34

Research

I am a probabilist, with a special interest in random trees and random graphs: my present research deals with the asymptotic properties of those large combinatorial structures. This interest includes the applications of random trees to biology (genealogy of continuous trees and coalescent processes).

Publications:

A Williams' Decomposition for Spatially Dependent Superprocesses with Jean-François Delmas,  EJP 18 (2013), no. 1801, 1-43
Stable continuous branching processes with immigration and Beta-Fleming-Viot processes with immigration with Clément Foucart,  EJP 18 (2013), no. 23, 1-21
Change of measure in the lookdown particle system SPA 123 (2013), 2054-2083
The fixation line in the Lambda-coalescent Ann. Appl. Probab. (2015), Vol. 25, No. 5, 3007–3032
On trees invariant under edge contraction with Pascal Maillard, Journal de l'École polytechnique, 3 (2016), p. 365-400

Preprints:

Weak subcritical percolation on finite mean-field graphs, October 2017

Proceedings:

Probabilités et biologie with Vincent Bansaye, Jean-François Delmas, Pierre Vallois, Linglong Yuan,  ESAIM Proceedings, Volume 44 (2104), 197-213

Teaching


2017-2018:  at Orsay: M101 (Calculus), M306 (Probability and Measure theory); M316 (Probability); at ENSTA: MAP-PRB1 (Markov chains), MAP-PRB2 (Martingales); at ENPC: Probabilites 1A
2016-2017:  at Orsay: M101 (Calculus),  M106 (Analysis), M306 (Probability and Measure theory); at ENSTA: MAP-PRB1 (Markov chains), MAP-PRB2 (Martingales);
2015-2016:  at Orsay: Probability for PCSO (Préparation au cursus scientifique d'Orsay), M101 (Calculus),  M106 (Analysis), M306 (Probability and Measure theory); at ENSTA: MAP-PRB2 (Martingales)
2012-2013: Tutorials for the master course by G. Kersting on Martingale problems (Winter Semester). Tutorials for the invited lecture (master level) of T.G. Kurtz on "Martingale problems and stochastic equations for Markovprocesses" (Sommer Semester).
2010-2012: Lectures and Tutorials for the third year course in in Probability and Statistics at ENPC (head: B. Jourdain).
2009-2011: Tutorials for the third year course in Probability and Statistics at ENSTA by J.F. Delmas.