Spreading-vanishing dichotomy in information diffusion of online social networks with intervention
In this paper, multiple information diusion in online social net-works with free boundary condition is investigated. We prove a spreading-vanishing dichotomy for the problem: i.e., either at least one piece of information lasts forever or all information suspend in nite time. The criterion for spreading and vanishing is established, it is related to the initial spreading area and the expansion capacity. We also obtain several cases of the asymptotic behavior of the information under dierent conditions. When the information spreads, we provide some upper and lower bounds of the spreading speed corresponding to dierent cases of asymptotic behavior of the information. In addition, numerical examples are given to illustrate the impacts of the initial spreading area and the expansion capacity on the free boundary, and all cases of the asymptotic behavior of the information.