Sirine Louati

collaborators

3 papers

math.ST2026

Gradient-free stochastic optimization of derivatives under strong convexity

Arya Akhavan, Sirine Louati, Alexandre B. Tsybakov

We consider the problem of minimizing the $k$ -th order partial derivative $f = \partial_{j}^{k} g$ of an unknown function $g$ along a fixed coordinate direction $j$ , based on noisy queri…

math.ST2025

Estimation of discrete distributions with high probability under $χ^{2}$ -divergence

Sirine Louati

We investigate the high-probability estimation of discrete distributions from an \iid sample under $χ^{2}$ -divergence loss. Although the minimax risk in expectation is well understoo…

math.ST2025

Performance of the empirical median for location estimation in heteroscedastic settings

Sirine Louati

We investigate the performance of the empirical median for location estimation in heteroscedastic settings. Specifically, we consider independent symmetric real-valued random varia…

Gradient-free stochastic optimization of derivatives under strong convexity

Estimation of discrete distributions with high probability under χ2-divergence

Performance of the empirical median for location estimation in heteroscedastic settings

Estimation of discrete distributions with high probability under $χ^{2}$ -divergence