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Welcome to the personal webpage of

Alexis Devulder


Photo Alexis Devulder


Here is a French version.

I am maître de conférences (roughly equivalent to associate professor) at Université de Versailles Saint-Quentin-en-Yvelines.   I teach in the Department of Mathematics and do my research in the Laboratoire de Mathématiques de Versailles 
(CNRS UMR 8100).

I am responsible, for Mathematics, of the option Mathematics, Physics and Applications of the Double diploma Mathematics, Physics and Sciences for Ingineer of Université Paris Saclay, which was previously the Double bachelor of Mathematics and Physics of UVSQ.

I am also member of the Conseil National des Universités section 26.

Coordinates:  Laboratoire de Mathématiques de Versailles, UVSQ, CNRS, Université Paris-Saclay, Bâtiment Fermat, bureau 2301, 45 avenue des Etats-Unis, 78035 Versailles Cedex, France
Tel: (+33) 1 39 25 46 28      Fax: (+33) 1 39 25 46 45     E-mail:  devulder "at" math.uvsq.fr

Research:
  Probability theory, and more particularly Random environments, Random walks in random environments, Sinai walk, Diffusions in random potentials, Branching processes in random environments.

Preprint:
Annealed local limit theorem for Sinai's random walk in random environment. Preprint arXiv:2309.13020, 82 pages, 9 figures: arXiV

Publications:  
11. Infinitely many collisions between a recurrent simple random walk and arbitrary many transient random walks in a subballistic random environment. Electronic Communications in Probability 30 paper no. 38 (2025), 1-11 arXiV Article  
10. (with Nina Gantert and Françoise Pène) Arbitrary many walkers meet infinitely often in a subballistic random environment. Electronic Journal of Probability 24, no. 100 (2019), 1-25 arXiV Article
9. (with Nina Gantert and Françoise Pène) Collisions of several walkers in recurrent random environments. Electronic Journal of Probability 23, no. 90 (2018), 1-34 HAL Article
8. (with Frank Aurzada, Nadine Guillotin-Plantard and Françoise Pène)
Random walks and branching processes in correlated Gaussian environment. Journal of Statistical Physics 166, no 1, (2017), 1-23 arXiv Article   
7. (with Pierre Andreoletti and Grégoire Véchambre)
Renewal structure and local time for diffusions in random environment. ALEA, Lat. Am. J. Probab. Math. Stat. 13 (2016), 863-923 arXiv Article
6. The Maximum of the Local Time of a Diffusion Process in a Drifted Brownian Potential.  Séminaire de Probabilités
XLVIII, 123-177. Lecture Notes in Math., 2168, Springer (2016) arXiv Article
5. Persistence of some additive functionals of Sinai's walk. Annales de l'Institut Henri Poincaré - Probabilités et Statistiques 52 (2016),  No. 3, 1076-1105 Article arXiv
4. (with Pierre Andreoletti)
Localization and number of visited valleys for a transient diffusion in random environment. Electronic Journal of Probability 20 (2015), no 56, 1-58 Article
3. (with Françoise Pène)
Random walk in random environment in a two-dimensional stratified medium with orientations.  Electronic Journal of Probability 18 (2013), no. 18, 1-23  Article
2. The speed of a branching system of random walks in random environment.  Statistics and Probability Letters 77 (2007), 1712-1721  HAL Article
1. Some properties of the rate function of quenched large deviations for random walks in random environment. Markov Processes and Related Fields, 12, 27-42 (2006)  arXiv
*. Almost sure asymptotics for a diffusion process in a drifted Brownian potential. This preprint
arXiv:math/0511053 has been merged with [6].

Proceedings :  
2.  (avec Roland Diel et Xiaolin Zeng) Some recent advances in random walks and random environments.  ESAIM: Proceedings and surveys 74 (2023), 38-50   Article
1. Random walks and branching processes in correlated Gaussian environment: persistence and applications" (about a joint work with Frank Aurzada, Nadine Guillotin-Plantard and Françoise Pène). Mathematisches Forschungsinstitut Oberwolfach, Report No. 32/2020, 1616-1619 (2020)  Article

PhD:

Etude de certains phénomènes en milieux aléatoires. PhD thesis, under the supervision of Zhan Shi, november 2005. ps pdf

Coauthors:  

Upcoming conferences:  
Teaching:  
Documents related to my teaching are available on online plateforms of the university: e-campus2 or Moodle.

Seminar of Probability and Statistics of Versailles