Dipartimento di Matematica, Sapienza Università di Roma Martedì 8 novembre Ore 14:00, Aula di Consiglio Seminario di Probabilità e Statistica Matematica Pham Thi Da Cam, Université de Tours, France The survival probability of a critical multi-type branching process in i.i.d. random environment Abstract: We consider Galton Watson branching processes of unique type and multi-type in fixed and in random environment. The main target is to observe the asymptotic behaviour of the survival probability of the population. In particular, we utilise the generating function method thanks to the recursive structure of the process in deterministic case and condition to the generating function of offspring distribution in random case. Tutti gli interessati sono invitati a partecipare. Per qualsiasi richiesta di informazione scrivere a piccioni@mat.uniroma1.it