## Olivier Hénard

**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).

- Since 2015 "Maître de conférences" at the Département de Mathématiques in Université Paris-Sud, a member of Paris-Saclay.
- From 2013 to 2015,
I was a postdoctoral research assistant at Queen Mary University of London (QMUL), working with Malwina Luczak. During the academic year 2012-2013, I held a similar position at ISMI, Goethe Universität, Frankfurt, and collaborated with Götz Kersting and
Anton Wakolbinger on "Evolving Coalescents".
- I defended my PhD thesis (2009-2012) in December 2012. The thesis, "Genealogy and Q process", has been mentored by
Jean-François Delmas. It is concerned with singular conditionings of stochastic processes modeling evolving populations.
The slides are there.
You may also download the manuscript here.

####

### 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.