Il giorno 11 Febbraio 2026, alle ore 11:30, in aula G, del Dipartimento di Matematica e Applicazioni R. Caccioppoli, il Prof. Nicos Georgiou, School of Mathematical and Physical Sciences, University of Sussex, terrà il seguente seminario: Title: Mean-field limit and parameter estimation for contagion dynamics on higher-order structures. Abstract: Classical models of contagion epidemics have graph based representations where the nodes represent the population and infections occur from an infected individual to a susceptible individual via a network link between them. At the same time, healing mechanisms try to fight the epidemic at node level. The simple descriptions of these representations also underscore their limitations, since the propagation of contagions in complex systems often involves repeated or simultaneous stimuli that individuals receive from their social contacts (such as their work or household). One may mechanistically encode these non-linear effects into contagion models by considering interactions that go beyond simple pairwise connections, by using hypergraphs rather than graphs. In this talk we will see the role higher-order interactions can play in the behaviour of the model when a rigorous mean-field can be obtained. Furthermore, we will discuss some inference techniques for the parameters of the epidemic (rates of infection) when only partial information on the type of infection is available and with only a single realisation of the epidemic curve as a datum. Sarà possibile seguire il seminario anche on line all'indirizzo: Seminario Prof. Nicos Georgiou | Partecipazione alla riunione | Microsoft Teams [1] Cordiali saluti, Luigia Caputo -- Luigia Caputo, PhD Ricercatore Universitario di Probabilità e Statistica Matematica, Dipartimento di Matematica e Applicazioni, Università di Napoli FEDERICO II Via Cintia, 80126, NAPOLI https://www.docenti.unina.it/luigia.caputo Links: ------ [1] https://teams.microsoft.com/meet/31163119321676?p=0yg2ZqOMTtwT5EC1l7