High-dimensional VAR with low-rank transition

P Alquier, K Bertin, P Doukhan, R Garnier - Statistics and Computing, 2020 - Springer
We propose a vector auto-regressive model with a low-rank constraint on the transition
matrix. This model is well suited to predict high-dimensional series that are highly correlated …

Deviation inequalities for contractive infinite memory process

P Doukhan, X Fan - arXiv preprint arXiv:2408.11719, 2024 - arxiv.org
In this paper, we introduce a class of processes that contains many natural examples. The
interesting feature of such type processes lays on its infinite memory that allows it to record a …

Concentration inequalities for non-causal random fields

R Garnier, R Langhendries - Electronic Journal of Statistics, 2022 - projecteuclid.org
Concentration inequalities are widely used for analyzing machine learning algorithms.
However, the current concentration inequalities cannot be applied to some non-causal …

Deviation bound for non-causal machine learning

R Garnier, R Langhendries - arXiv preprint arXiv:2009.08905, 2020 - arxiv.org
Concentration inequalities are widely used for analyzing machine learning algorithms.
However, current concentration inequalities cannot be applied to some of the most popular …

Deviation inequalities for a supercritical branching process in a random environment

H Xu - arXiv preprint arXiv:2109.03489, 2021 - arxiv.org
Let $\left\{Z_ {n}, n\ge 0\right\} $ be a supercritical branching process in an independent and
identically distributed random environment $\xi=\left (\xi _ {n}\right) _ {n\geq 0} $. In this …

Deviation inequalities for stochastic approximation by averaging

X Fan, P Alquier, P Doukhan - Stochastic Processes and their Applications, 2022 - Elsevier
We introduce a class of Markov chains that includes models of stochastic approximation by
averaging and non-averaging. Using a martingale approximation method, we establish …

Machine Learning sur les séries temporelles et applications à la prévision des ventes pour l'E-Commerce

R Garnier - 2021 - theses.hal.science
Prédire les futures valeurs de séries temporelles semble pourtant nécessaire dans de
nombreux domaines. On trouve ainsi des applications pour contrôler divers processus …