A strong module of a graph is a graph module that does not overlap any other graph module. Two vertex sets overlap when their intersection and both set differences are nonempty. The strong modules are nested and form the nodes of the modular decomposition tree.
Strong Module
See also
Graph Module, Modular Decomposition, Modular Decomposition TreeExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Strong Module." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/StrongModule.html