Editing Graph theory (section)

=== Social sciences ===
[[File:Moreno Sociogram 2nd Grade.png|thumb|Graph theory in sociology: [[Jacob L. Moreno|Moreno]] [[Sociogram]] (1953).<ref>Grandjean, Martin (2015). [http://www.martingrandjean.ch/social-network-analysis-visualization-morenos-sociograms-revisited/ "Social network analysis and visualization: Moreno’s Sociograms revisited"]. Redesigned network strictly based on Moreno (1934), ''Who Shall Survive''.</ref>]]
Graph theory is also widely used in [[sociology]] as a way, for example, to [[Six Degrees of Kevin Bacon|measure actors' prestige]] or to explore [[Rumor spread in social network|rumor spreading]], notably through the use of [[social network analysis]] software. Under the umbrella of social networks are many different types of graphs.<ref>{{cite book|last=Rosen|first=Kenneth H.|title=Discrete mathematics and its applications|publisher=McGraw-Hill|location=New York|isbn=978-0-07-338309-5|edition=7th|date=2011-06-14}}</ref> Acquaintanceship and friendship graphs describe whether people know each other. Influence graphs model whether certain people can influence the behavior of others. Finally, collaboration graphs model whether two people work together in a particular way, such as acting in a movie together.