activity
20202025
most citedAn Infinite-Dimensional SIS Model

3 citations · 8 across the 10 of their papers we have counts for

collaborators

11 papers

math.PR2025

Equivalence by coupling for heterogeneous SIS models*

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

We consider the optimal allocation of (perfect) vaccine in an heterogeneous SIS model. Using a coupling approach, we explain how different models for the heterogeneity of the popul…

q-bio.PE2025

Topological Properties of the Effective Reproduction Number in an Heterogeneous SIS Model

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

This present results lay the foundations for the study of the optimal allocation of vaccine in the simple epidemiological SIS model where one consider a very general heterogeneous…

math.OC2025

Optimal Vaccination Strategies for an Heterogeneous SIS Model

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

We study in a general mathematical framework the optimal allocation of vaccine in an heterogeneous population. We cast the problem of optimal vaccination as a bi-objective minimiza…

math.SP2024

Transformations preserving the effective spectral radius of a matrix

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

We discuss transformations on matrices that preserve the effective spectrum and/or the effective spectral radius.

math.DS2022

Vaccinating according to the maximal endemic equilibrium achieves herd immunity

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

We consider the simple epidemiological SIS model for a general heterogeneous population introduced by Lajmanovich and Yorke (1976) in finite dimension, and its infinite dimensional…

math.OC2022

The effective reproduction number: convexity, concavity and invariance

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

Motivated by the question of optimal vaccine allocation strategies in heterogeneous population for epidemic models, we study various properties of the \emph{effective reproduction…

math.OC2022

Optimal vaccinations: Cordons sanitaires, reducible population and optimal rays

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

We consider the bi-objective problem of allocating doses of a (perfect) vaccine to an infinite-dimensional metapopulation in order to minimize simultaneously the vaccination cost a…

math.OC2021★ 1 cited

Optimal vaccination: Various (counter) intuitive examples

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

In previous articles, we formalized the problem of optimal allocation strategies for a (perfect) vaccine in an infinite-dimensional metapopulation model. The aim of the current pap…

math.OC2021★ 2 cited

Effective reproduction number: Convexity, invariance and cordons sanitaires

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

We consider the problem of optimal allocation strategies for a (perfect) vaccine in an infinite-metapopulation model (including SIS, SIR, SEIR,. . .), when the loss function is giv…

math.PR2021★ 2 cited

Targeted Vaccination Strategies for an Infinite-dimensional SIS Model

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

We formalize and study the problem of optimal allocation strategies for a (perfect) vaccine in the infinite-dimensional SIS model. The question may be viewed as a bi-objective mini…

math.DS2020★ 3 cited

An Infinite-Dimensional SIS Model

Jean-François Delmas, Dylan Dronnier, Pierre-André Zitt

In this article, we introduce an infinite-dimensional deterministic SIS model which takes into account the heterogeneity of the infections and the social network among a large popu…