第七章图与网络(1) Chapter 7: Graph and Network(1) 1. exampl 2. some basic concept of graph and network no direction graph direction graph node adjacent relating are multiple-layer arcs simple graph multiple-layer graph number of connected are with the node node without connected are node only one connected arc 运学 狼中描教运筹学 熊中楷教授 第七章 图与网络（1） Chapter 7: Graph and Network(1) 1. example 2. some basic concept of graph and network: no direction graph direction graph node adjacent relating arc loop multiple-layer arcs simple graph multiple-layer graph number of connectedarc with the node node without connectedarc node only one connectedarc