Power Graph and Exchange Property for Resolving Sets
  A formula for computing the metric dimension of a simple graph, having no singleton twin, is given. A sufficient condition for a simple graph to have the exchange property, for resolving sets, is found. Some families of power graphs of finite groups, having this exchange property, are identified. The metric dimension of the power graph of a dihedral group is also computed. 
Usman Ali, Ghulam Abbas, Syed Ahtisham Bokhary
math.CO