search term “graph” ??? Vasiliki Kalavri | Boston University 2020 Basics 1 5 4 3 2 “node” or “vertex” “edge” 1 5 4 3 2 undirected graph directed graph 4 ??? Vasiliki Kalavri | Boston University a like on an online post, a bitcoin transaction, a packet routed from a source to destination Vertex events: A new product, a new movie, a user ??? Vasiliki Kalavri | Boston University 2020 6 ? University 2020 8 Some algorithms model graph streams a sequence of vertex events. A vertex stream consists of events that contain a vertex and all of its neighbors. Although this model can enable a theoretical