Minimax Testing

Sharp Local Minimax Rates for Goodness-of-Fit Testing in multivariate Binomial and Poisson families and in multinomials Julien Chhor, Alexandra Carpentier. Mathematical Statistics and Learning.

Goodness-of-Fit Testing for Hölder-Continuous Densities: Sharp Local Minimax Rates
Julien Chhor, Alexandra Carpentier.

Sparse Signal Detection in Heteroscedastic Gaussian Sequence Models: Sharp Minimax Rates
Julien Chhor, Rajarshi Mukherjee, Subhabrata Sen. To appear in Bernoulli.

Robustness and local differential privacy

Robust Estimation of Discrete Distributions under Local Differential Privacy
Julien Chhor and Flore Sentenac. Algorithmic Learning Theory, 2023.

Benign overfitting

Benign overfitting and adaptive nonparametric regression
Julien Chhor, Suzanne Sigalla and Alexandre Tsybakov