The theory of social networks allows us to  mathematically model and analyze the relationships between governments, organizations and even the rival factions warring on Game of Thrones. 

In this short introduction to networks, we talk about what a network is, the definition of graph, vertex and vertices, edges, loops and the degree of a vertex.
 

From social media to massive financial institutions, we live within a web of networks. But how do they work?

An introduction to graph theory and networks.