"people need to organise their lives in ways that increase their chances of unexpectedly bumping into someone who can tell them something useful" - The power of Pull (2010)
different knowledge topics
Metcalfe's Law states that the power of a network increases exponentially as the number of members grows larger. This law is derived from the mathematical graph theory. A graph consists of a collection of vertices (nodes) and edges (that connect pairs of vertices) - what we would call a network. You can calculate with graphs. The so- called 'complete graph' is an interesting one, where every node is connected with every other one.