Network theory and filter design. Network theory. A small example network with eight vertices and ten edges.
It has applications in many disciplines including statistical physics, particle physics, computer science, electrical engineering, biology, economics, operations research, and sociology. Applications of network theory include logistical networks, the World Wide Web, Internet, gene regulatory networks, metabolic networks, social networks, epistemological networks, etc; see List of network theory topics for more examples. Euler's solution of the Seven Bridges of Königsberg problem is considered to be the first true proof in the theory of networks.[1] Social network. Social networks and the analysis of them is an inherently interdisciplinary academic field which emerged from social psychology, sociology, statistics, and graph theory.
Georg Simmel authored early structural theories in sociology emphasizing the dynamics of triads and "web of group affiliations. "[2] Jacob Moreno is credited with developing the first sociograms in the 1930s to study interpersonal relationships.