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Line 68: Flows can pertain to people or material over transportation networks, or to electricity over [[electrical distribution]] systems. For any such physical network, the flow coming into any intermediate node needs to equal the flow going out of that node. This conservation constraint is equivalent to [[Kirchhoff's current law]]. Flow networks also find applications in [[ecology]]: flow networks arise naturally when considering the flow of nutrients and energy between different ~~organizations~~organisms in a [[food web]]. The mathematical problems associated with such networks are quite different from those that arise in networks of fluid or traffic flow. The field of ecosystem network analysis, developed by [[Robert Ulanowicz]] and others, involves using concepts from [[information theory]] and [[thermodynamics]] to study the evolution of these networks over time. ==Classifying flow problems==

Flow network: Difference between revisions