An open question in graph theory asks whether the inverse domination number of an
isolate-free graph is always less than or equal to the independence number of said
graph. We discuss several classes of graphs for which this conjecture has
already been proved and state general upper bounds on the inverse domination
number. We also provide examples to demonstrate the complexity of this
problem. This problem appears to be easier to address for graphs with a unique
minimum dominating set or with maximum dual domination number. We
end with two sections discussing these properties and their relation to this
problem.
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