Alexandre TSYBAKOV


Alexandre TSYBAKOV
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Gradient-free stochastic optimization for additive models

We address the problem of zero-order optimization from noisy observations for an objective function satisfying the Polyak-Łojasiewicz or the strong convexity condition. Additionally, we assume that t ...

Akhavan Arya, Tsybakov Alexandre B.

Arxiv, Cornell University, 2025

Minimax estimation of functionals in sparse vector model with correlated observations

We consider the observations of an unknown s-sparse vector θ corrupted by Gaussian noise with zero mean and unknown covariance matrix Σ. We propose minimax optimal methods of estimating the ℓ2 n ...

Wang Yuhao, Yang Pengkun, Tsybakov Alexandre

Arxiv, Cornell University, 2024

Generalized multi-view model: Adaptive density estimation under low-rank constraints

We study the problem of bivariate discrete or continuous probability density estimation under low-rank constraints.For discrete distributions, we assume that the two-dimensional array to estimate is a ...

Chhor Julien, Klopp Olga, Tsybakov Alexandre

Arxiv, Cornell University, 2024

Benign overfitting and adaptive nonparametric regression

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Chhor J,Sigalla S,Tsybakov AB

arXiv [math.ST], 2022

Estimation of the l_2-norm and testing in sparse linear regression with unknown variance

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Carpentier A,Collier O,Comminges L,Tsybakov AB,Wang Y

Bernoulli, 2022

Estimating the minimizer and the minimum value of a regression function under passive design

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Akhavan A,Gogolashvili D,Tsybakov AB

arXiv [math.ST], 2022

Improved Clustering Algorithms for the Bipartite Stochastic Block Model

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Ndaoud M,Sigalla S,Tsybakov AB

IEEE Transactions on Information Theory, 2022

Adaptive robust estimation in sparse vector model

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Comminges L,Collier O,Ndaoud M,Tsybakov AB

The Annals of Statistics, 2021

Assigning Topics to Documents by Successive Projections

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Klopp O,Panov M,Sigalla S,Tsybakov AB

Assigning Topics to Documents by Successive Projections. 2021, 2021

On estimation of nonsmooth functionals of sparse normal means

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Collier O,Comminges L,Tsybakov AB

Bernoulli, 2020

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