Explored nodes that are within the overlap region are put on a stack of nodes to revisit, whereas the nodes that fall outside are ignored, effectively pruning the search. When the stack turns up empty, this indicates completion of the search.
Explored nodes that arewithin the overlap region are put on a stack of nodes to revisit,whereas the nodes that fall outside are ignored, effectively pruningthe search. When the stack turns up empty, this indicates completionof the search.