D. Guillot

activity

20122026

most citedIterative Thresholding Algorithm for Sparse Inverse Covariance Estimation

71 citations · 71 across the 3 of their papers we have counts for

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3 papers · 1 filter

math.CA2026

Distance preservers for Lobachevsky space

Alexander Belton, Dominique Guillot, Apoorva Khare +1

We obtain a complete description of the class of entrywise preservers of Lorentz-Gram matrices. This resolves, for the case of constant negative curvature, the classification of en…

math.CA2019

Total nonnegativity of GCD matrices and kernels

Dominique Guillot, Jiaru Wu

Let $X = (x_{1}, \dots, x_{n})$ be a vector of distinct positive integers. The $n \times n$ matrix $S = S (X) := (g cd (x_{i}, x_{j}))_{i, j = 1}^{n}$ , where $g cd (x_{i}, x_{j})$ denotes the greatest com…

math.CA2018

A panorama of positivity

Alexander Belton, Dominique Guillot, Apoorva Khare +1

This survey contains a selection of topics unified by the concept of positive semi-definiteness (of matrices or kernels), reflecting natural constraints imposed on discrete data (g…