Abstract
In this paper, multiple information diffusion in online social networks 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 finite 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 different conditions. When the information spreads, we provide some upper and lower bounds of the spreading speed corresponding to different 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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1843-1865 |
| Number of pages | 23 |
| Journal | Discrete and Continuous Dynamical Systems - Series B |
| Volume | 24 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2019 |
Keywords
- Diffusion model
- Free boundary
- Social networks
- Spreading speed
- Spreading-vanishing
ASJC Scopus subject areas
- Discrete Mathematics and Combinatorics
- Applied Mathematics