1 code implementation • 13 Jun 2024 • Clément Bonet, Théo Uscidda, Adam David, Pierre-Cyril Aubin-Frankowski, Anna Korba
As the problem of minimizing functionals on the Wasserstein space encompasses many applications in machine learning, different optimization algorithms on $\mathbb{R}^d$ have received their counterpart analog on the Wasserstein space.
1 code implementation • 11 Mar 2024 • Clément Bonet, Lucas Drumetz, Nicolas Courty
On Euclidean spaces, a popular alternative is the Sliced-Wasserstein distance, which leverages a closed-form solution of the Wasserstein distance in one dimension, but which is not readily available on manifolds.
no code implementations • 23 Nov 2023 • Clément Bonet
Back to the original Euclidean Sliced-Wasserstein distance between probability measures, we study the dynamic of gradient flows when endowing the space with this distance in place of the usual Wasserstein distance.
1 code implementation • 4 Jul 2023 • Guillaume Mahey, Laetitia Chapel, Gilles Gasso, Clément Bonet, Nicolas Courty
Wasserstein distance (WD) and the associated optimal transport plan have been proven useful in many applications where probability measures are at stake.
no code implementations • 12 Jun 2023 • Thibault Séjourné, Clément Bonet, Kilian Fatras, Kimia Nadjahi, Nicolas Courty
In parallel, unbalanced OT was designed to allow comparisons of more general positive measures, while being more robust to outliers.
2 code implementations • 10 Mar 2023 • Clément Bonet, Benoît Malézieux, Alain Rakotomamonjy, Lucas Drumetz, Thomas Moreau, Matthieu Kowalski, Nicolas Courty
When dealing with electro or magnetoencephalography records, many supervised prediction tasks are solved by working with covariance matrices to summarize the signals.
1 code implementation • 18 Nov 2022 • Clément Bonet, Laetitia Chapel, Lucas Drumetz, Nicolas Courty
It has been shown beneficial for many types of data which present an underlying hierarchical structure to be embedded in hyperbolic spaces.
1 code implementation • 17 Jun 2022 • Clément Bonet, Paul Berg, Nicolas Courty, François Septier, Lucas Drumetz, Minh-Tan Pham
Many variants of the Wasserstein distance have been introduced to reduce its original computational burden.
no code implementations • 21 Oct 2021 • Clément Bonet, Nicolas Courty, François Septier, Lucas Drumetz
In the context of optimal transport methods, the subspace detour approach was recently presented by Muzellec and Cuturi (2019).
1 code implementation • 21 Oct 2021 • Clément Bonet, Nicolas Courty, François Septier, Lucas Drumetz
However, it requires solving a nested optimization problem at each iteration, and is known for its computational challenges, especially in high dimension.