About me
I am a Member of Technical Staff at The Forecasting Company, a research lab building foundation models for time-series forecasting.
Previously, I taught analysis and probability as a visiting professor at École Centrale de Pékin, in China. Before that I was the first employee and R&D Lead at Ida, a French AI startup that optimizes fresh food orders for retailers. I built its whole R&D pipeline from scratch, and Ida was bought by RELEX Solutions in 2025.
On the side I run HSK Level and Chinese Grammar Gems, a platform and newsletter for learning Chinese that together reach more than 25,000 people around the world.
I did my PhD in applied mathematics and machine learning at Institut Polytechnique de Paris, working on algorithmic optimal transport with Marco Cuturi as my advisor.
Featured demo · Subspace Robust Wasserstein
A live taste of my research: Subspace Robust Wasserstein Distances (Paty & Cuturi, ICML 2019). Optimal transport measures the effort to morph one point cloud, \(\mu\), into another, \(\nu\); this demo finds the single line (yellow) along which the two clouds are hardest to align. Drag either cloud to move it around.
News
- September 7, 2026: I joined The Forecasting Company as a Member of Technical Staff.
- December 2025: Ida was acquired by RELEX Solutions.
- September 2025: I joined École Centrale de Pékin as a visiting mathematics professor.
- December 11, 2024: I gave a course on operations research at the Ecole Nationale des Ponts et Chaussées.
- October 2, 2023: I joined Ida as a research scientist.
Older events
- June 27, 2022: I gave a talk in the New Monge Problems seminar at the Université Gustave Eiffel near Paris.
- May 11, 2022: I gave a talk (slides in .pdf) at the Mokaplan team seminar at INRIA in Paris.
- October 21–22, 2021: I participated in the Paris workshop on optimal transport with applications to economics and statistics at Sciences Po Paris.
- June 29, 2021: I defended my PhD thesis (slides in pdf and the manuscript) at ENSAE Paris.
- March 31, 2021: I gave a talk at the EDMH PhD students seminar (video in French).
- March 4, 2021: I gave a talk at the Image, Optimization and Probability seminar at the Institut de Mathématiques de Bordeaux.
- August 28, 2020: We received a Notable Paper Award at AISTATS 2020 for our paper "Regularity as Regularization: Smooth and Strongly Convex Brenier Potentials in Optimal Transport".
- August 26–28, 2020: I presented our paper "Regularity as Regularization: Smooth and Strongly Convex Brenier Potentials in Optimal Transport" at AISTATS 2020.
- July 12–18, 2020: I presented our paper "Regularized Optimal Transport is Ground Cost Adversarial" at ICML 2020.
- January 17, 2020: I gave a talk (slides) at the seminar day Learning meets Astrophysics at CEA in Saclay, France.
- December 08–14, 2019: I presented our paper Regularity as Regularization: Smooth and Strongly Convex Brenier Potentials at NeurIPS Optimal Transport and Machine Learning Workshop in Vancouver, Canada.
- November 20, 2019: I gave an introductory lecture on optimal transport at the seminar Stat·Eco·ML in Palaiseau, France.
- November 05, 2019: I gave a talk (slides) at Le Séminaire Palaisien in Palaiseau, France.
- August 26–31, 2019: I participated in, and gave a tutorial (notebooks, video) at Machine Learning Summer School in Moscow, Russian Federation.
- July 07–19, 2019: I participated in, gave a talk (.pdf) and presented a poster (.pdf), in Saint-Flour Probability Summer School in Saint-Flour, France.
- June 24–28, 2019: I participated in the workshop People in Optimal Transportation and Applications in Cortona, Italy.
- June 09–15, 2019: I presented (poster and 20-minute oral) our paper "Subspace Robust Wasserstein Distances" at ICML 2019 in Long Beach, USA.
- March 25–29, 2019: I presented a poster (.pdf) at the workshop Optimization and Statistical Learning in Les Houches, France.
Education
- PhD from Institut Polytechnique de Paris
- Engineering degree from Ecole Polytechnique
- Engineering degree from ENSAE Paris
- Master's degree in Statistics and Machine Learning from Université Paris-Sud
Introduction au transport optimal (en français)
Voici une introduction au transport optimal extraite d'un séminaire de vulgarisation que j'ai donné à destination des doctorants de l'École doctorale Hadamard en mars 2021.