Nayel Bettache

activity

20212024

collaborators

3 papers

math.ST2024

Bivariate Matrix-valued Linear Regression (BMLR): Finite-sample performance under Identifiability and Sparsity Assumptions

Nayel Bettache

This study explores the estimation of parameters in a matrix-valued linear regression model, where the $T$ responses $(Y_{t})_{t = 1}^{T} \in R^{n \times p}$ and predictors $(X_…

math.ST2023

Two-sided Matrix Regression

Nayel Bettache, Cristina Butucea

The two-sided matrix regression model $Y = A^{*} X B^{*} + E$ aims at predicting $Y$ by taking into account both linear links between column features of $X$ , via the unknown matrix $B^{*}$ …

math.ST2021

Fast Non-Asymptotic Testing And Support Recovery For Large Sparse Toeplitz Covariance Matrices

Nayel Bettache, Cristina Butucea, Marianne Sorba

We consider $n$ independent $p$ -dimensional Gaussian vectors with covariance matrix having Toeplitz structure. We test that these vectors have independent components against a stat…