Rafaël Coyaud

PhD Student / CERMICS


I am a PhD student in Optimal Transportation at CERMICS, École des Ponts ParisTech. With my advisors Aurélien Alfonsi and Virginie Ehrlacher, we are working on the study of deterministic and stochastic algorithms for multimarginal and martingale constraints optimal transportation.

Research Topic

This PhD focuses on the study of efficient algorithms for multimarginal and martingale constraints optimal transportation problems.

Optimal tranportation problems have various applications both in finance, in economy or in physics. In particular, we want to apply our algorithm to the computation of the Lévy-Lieb functional used in the Density Functional Theory.

However, in the case of multimarginal constraints optimal transportation problem, current algorithms scale exponentially in the number of marginal laws; which forbids the computation of the transport for large systems. We aim to have an algorithm with a linear scale using a particle algorithm.


I co organize with Laura Silva-Lopes and Adel Cherchali the Young Researchers Seminar at CERMICS.


I am a former student of École Polytechnique and Pierre and Marie Curie University. A detailed resume can be found here (English version) or here (French version).


Rafaël Coyaud
CERMICS, École Nationale des Ponts et Chaussées
6 et 8, av. Blaise Pascal
Cité Descartes - Champs-sur-Marne
77455 Marne-la-Vallée cedex 2

E-mail: rafael.coyaud[at]enpc.fr