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Hugo Richard

8 accepted papers

2025

Distribution-Aware Mean Estimation under User-level Local Differential Privacy

AISTATS 2025poster

We consider the problem of mean estimation under user-level local differential privacy, where $n$ users are contributing through their local pool of data samples. Previous work assume that the number of data samples is the same across users. In contrast, we consider a more general and realistic scen…

Cited by 0SourceScholar
2024

Constant or Logarithmic Regret in Asynchronous Multiplayer Bandits with Limited Communication

AISTATS 2024poster

Multiplayer bandits have recently garnered significant attention due to their relevance in cognitive radio networks. While the existing body of literature predominantly focuses on synchronous players, real-world radio networks, such as those in IoT applications, often feature asynchronous (i.e., ran…

2024

Improved learning rates in multi-unit uniform price auctions

NeurIPS 2024poster

Motivated by the strategic participation of electricity producers in electricity day-ahead market, we study the problem of online learning in repeated multi-unit uniform price auctions focusing on the adversarial opposing bid setting. The main contribution of this paper is the introduction of a new…

Cited by 0SourcePDFScholar
2024

Multi-armed bandits with guaranteed revenue per arm

AISTATS 2024poster

We consider a Multi-Armed Bandit problem with covering constraints, where the primary goal is to ensure that each arm receives a minimum expected reward while maximizing the total cumulative reward. In this scenario, the optimal policy then belongs to some unknown feasible set. Unlike much of the ex…

2024

Optimizing the coalition gain in Online Auctions with Greedy Structured Bandits

NeurIPS 2024poster

Motivated by online display advertising, this work considers repeated second-price auctions, where agents sample their value from an unknown distribution with cumulative distribution function $F$. In each auction $t$, a decision-maker bound by limited observations selects $n_t$ agents from a coaliti…

Cited by 0SourcePDFScholar
2023

On Preemption and Learning in Stochastic Scheduling

ICML 2023poster

We study single-machine scheduling of jobs, each belonging to a job type that determines its duration distribution. We start by analyzing the scenario where the type characteristics are known and then move to two learning scenarios where the types are unknown: non-preemptive problems, where each sta…

2021

Shared Independent Component Analysis for Multi-Subject Neuroimaging

NeurIPS 2021poster

We consider shared response modeling, a multi-view learning problem where one wants to identify common components from multiple datasets or views. We introduce Shared Independent Component Analysis (ShICA) that models each view as a linear transform of shared independent components contaminated by a…

2020

Modeling Shared responses in Neuroimaging Studies through MultiView ICA

NeurIPS 2020spotlight

Group studies involving large cohorts of subjects are important to draw general conclusions about brain functional organization. However, the aggregation of data coming from multiple subjects is challenging, since it requires accounting for large variability in anatomy, functional topography and st…