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Flux CentralityDefinition
This centrality developed based on the concept of maximum flow. Considering any two vertices s and t in a network, the maximum flow between the two is defined by the largest flow that is observed for all possible paths connecting the two [AHUJA, R. K., 1993]. In simple terms, out of the many connecting paths we are looking for a set of paths forming the ‘strongest carbon flux’ connecting s and t. Denote this maximum flow between s and t as max_flow (s,t). According shortestpath closeness centrality, which sums the lengths of the shortestpaths from a vertex s to all other vertices t (t∈V, V is the set of all vertices in the network), the maximumflow closeness defined as:
For each vertex the resulting value of the maximumflow closeness centrality might be interpreted as a ‘metabolic potential’ of the respective metabolite. The higher an mfc value of a metabolite, the more of it is converted into other metabolites throughout the network. It should be noted that a more precise name of the defined centrality is outmaximumflow closeness, because the flow leaving the vertex of interest is computed and a corresponding inmaximumflow closeness, computing the flow entering the vertex, might be defined in a similar way.
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