Scientists have attempted several times to define the notion of complexity. A proper definition uses elements of three sets: a set of sites, as set of connections, and a set of nodes coincides with the set. Sites and connections can be translated into terms of graph theory as vertices and edges, which enables to consider complexity as an associated graph.Thus complexity of a system (or a structure) will be defined as the number of possible figures and aspects which are obtained (...) by combining vertices and edges. Complexity is the product of two factors, the first factor is tied to the combination of nodes called mutability and the second is tied to the combination of edges called liability. (shrink)