Fractional calculus ties the microscopic and macroscopic scales of   complex network dynamics
  A two-state master equation based decision making model has been shown to generate phase transitions, to be topologically complex and to manifest temporal complexity through an inverse power-law probability distribution function in the switching times between the two critical states of consensus. These properties are entailed by the fundamental assumption that the network elements in the decision making model imperfectly imitate one another. The process of subordination establishes that a single network element can be described by a fractional master equation whose analytic solution yields the observed inverse power-law probability distribution obtained by numerical integration of the two-state master equation to a high degree of accuracy. 
Bruce J. West, Malgorzata Turalska, Paolo Grigolini
nlin.AO physics.soc-ph