Seminar Details
2011-02-15 (15.00) : The role of second trials in cascades of information over networks
At Euler building
Organized by Mathematical Engineering
Speaker :
Krings, Gautier
Abstract :
We study the propagation of information in social networks. To do so, we focus on a cascade model where nodes are infected with
probability p_1 after their first contact with the information and with probability p_2 at all subsequent contacts. The diffusion starts
from one random node and leads to a cascade of infection. It is shown that first and subsequent trials play different roles in the propagation
and that the size of the cascade depends in a nontrivial way on p_1, p_2, and on the network structure. Second trials are shown to amplify
the propagation in dense parts of the network while first trials are dominant for the exploration of new parts of the network and launching
new seeds of infection.