@soniamazelet.bsky.social
PhD student at École Polytechnique and Inria working on optimal transport, machine learning and their applications to neuroscience
Our latest paper “The Quest for the GRAph Level autoEncoder (GRALE)” was accepted at NeurIPS 2025!
arxiv.org/abs/2505.22109
🏆 GRALE 🏆 can encode and decode graphs into and from a shared Euclidean space.
Training such a model should require solving the graph matching problem but...
We apply ULOT to the problem of brain alignment and find that it predicts near-optimal FUGW plans up to 100× times faster than other solvers.
This efficiency enables detailed exploration of the effects of the FUGW hyperparameters on the optimal plans, and many more applications!
(5/5)
ULOT predicts FUGW plans conditioned on the FUGW hyperparameters.
Trained in a fully unsupervised way by minimizing the FUGW loss, it ensures the near optimality of its predictions and diminishes the complexity of finding optimal FUGW plans from cubic to quadratic in the number of nodes.
(4/5)
Matching graphs can be achieved with the optimal transport distance Fused Unbalanced Gromov Wasserstein (FUGW). It produces meaningful plans but requires solving an optimization problem with cubic complexity in the number of nodes, which limits its applications.
(3/5)
We developed ULOT, a neural network designed to predict optimal transport plans between graphs. It achieves accurate predictions up to 100× faster than solvers, both on synthetic graphs and on brain data.
(2/5)
I am happy to share that our paper "Unsupervised Learning for Optimal Transport plan prediction between unbalanced graphs" was accepted at Neurips 2025 ! 🥳
Huge thanks to my co-authors @rflamary.bsky.social and Bertrand Thirion !
arxiv.org/abs/2506.12025
(1/5)
Very excited to share that I will be at NeurIPS this week with Christopher Kymn to present our work on spatial representation in the hippocampal formation. Come check out our poster !
arxiv.org/abs/2406.18808
