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Ludovic Dos Santos

7 accepted papers

2025

Improving Consistency Models with Generator-Augmented Flows

ICML 2025spotlight

Consistency models imitate the multi-step sampling of score-based diffusion in a single forward pass of a neural network. They can be learned in two ways: consistency distillation and consistency training. The former relies on the true velocity field of the corresponding differential equation, appro…

2024

A Conservative Approach for Few-Shot Transfer in Off-Dynamics Reinforcement Learning

IJCAI 2024poster

Off-dynamics Reinforcement Learning (ODRL) seeks to transfer a policy from a source environment to a target environment characterized by distinct yet similar dynamics. In this context, traditional RL agents depend excessively on the dynamics of the source environment, resulting in the discovery of p…

2023

Unifying GANs and Score-Based Diffusion as Generative Particle Models

NeurIPS 2023poster

Particle-based deep generative models, such as gradient flows and score-based diffusion models, have recently gained traction thanks to their striking performance. Their principle of displacing particle distributions using differential equations is conventionally seen as opposed to the previously wi…

2022

Convergence Rates of Non-Convex Stochastic Gradient Descent Under a Generic Lojasiewicz Condition and Local Smoothness

ICML 2022spotlight

Training over-parameterized neural networks involves the empirical minimization of highly non-convex objective functions. Recently, a large body of works provided theoretical evidence that, despite this non-convexity, properly initialized over-parameterized networks can converge to a zero training l…

Cited by 23SourcePDFScholar
2020

A Simple and Efficient Smoothing Method for Faster Optimization and Local Exploration

NeurIPS 2020poster

This work proposes a novel smoothing method, called Bend, Mix and Release (BMR), that extends two well-known smooth approximations of the convex optimization literature: randomized smoothing and the Moreau envelope. The BMR smoothing method allows to trade-off between the computational simplicity of…

Cited by 7SourcePDFScholar
2020

Coloring Graph Neural Networks for Node Disambiguation

IJCAI 2020poster

In this paper, we show that a simple coloring scheme can improve, both theoretically and empirically, the expressive power of Message Passing Neural Networks (MPNNs). More specifically, we introduce a graph neural network called Colored Local Iterative Procedure (CLIP) that uses colors to disambigua…

Cited by 0SourcePDFScholar
2019

Theoretical Limits of Pipeline Parallel Optimization and Application to Distributed Deep Learning

NeurIPS 2019poster

We investigate the theoretical limits of pipeline parallel learning of deep learning architectures, a distributed setup in which the computation is distributed per layer instead of per example. For smooth convex and non-convex objective functions, we provide matching lower and upper complexity bound…

Cited by 10SourcePDFScholar