Contact: bmorisse.math “at” protonmail.com

I was employed by the startup Sivienn from February to May 2020. I worked mainly on developping statistical estimators for multifractional Brownian motions, in view of an application to financial trading. I also investigated some boundary value problems for the propagation of waves in the ocean and potential applications to very low energy communications.

I was a Research Associate in Cardiff University from September 2017 to January 2020. My research was supported by EPSRC grant QUEST: Quantitative Estimates in Spectral Theory and Their Complexity (see https://cardiffquest.wordpress.com/ ).

I graduated in July 2017 from Université Paris Diderot. I worked under the supervision of Benjamin Texier on the issue of well-posedness for weakly hyperbolic or weakly elliptic systems of PDEs in Gevrey regularity ( my thesis ).

I am one of the organizer, alongside Frank Rosler and Jonathan Ben-Artzi, of the SmaSH Conference that took place last June in Cardiff. This Conference was really succesful, with plenty of interesting discussions and interactions.

I happily co-organized the conference An Analyst, a Geometer and a Probabilist walk into a bar with Jonathan Ben-Artzi in Cardiff in June 2018. It was a real success and a very joyful time!


  1. Averaging along degenerate flows on the annulus, with Jonathan Ben-Artzi (arxiv), 2019.
  2. Uniform convergence in von Neumann’s ergodic theorem in absence of a spectral gap, with Jonathan Ben-Arzti (arxiv – accepted in Ergodic Theory and Dynamical Systems), 2020.
  3. On hyperbolicity and Gevrey well-posedness. Part three: a model of weakly hyperbolic systems (arxiv – to appear in Indiana University Mathematics Journal ), 2018.
  4. On the action of pseudo-differential operators on Gevrey spaces, 2020 (pdf , arxiv – accepted in Asymptotic Analysis).
  5. On hyperbolicity and Gevrey well-posedness. Part two: scalar or degenerate transitions, 2017 (pdf , arxiv – accepted in Journal of Differential Equations).
  6. On hyperbolicity and Gevrey well-posedness. Part one: the elliptic case, 2016 (pdf , arxiv – accepted in Annales Henri Lebesgue).