Popular models Social network:a directed graph G=(V,E). Note that the edges are directed: How much an individual u can influence another individual v is generally different than how much v can influence u.--Just think of stars and fans. We consider the scenario where the diffusion proceeds in discrete time steps. 5Popular models ◼ Social network: a directed graph 𝐺 = 𝑉,𝐸 . ◼ Note that the edges are directed: ❑ How much an individual 𝑢 can influence another individual 𝑣 is generally different than how much 𝑣 can influence 𝑢. --- Just think of stars and fans. ◼ We consider the scenario where the diffusion proceeds in discrete time steps. 5