iterative deepening
<algorithm> A graph search algorithm that will find the shortest path
with some given property, even when the graph contains cycles. When searching
for a path through a graph, starting at a given initial node, where the path (or
its end node) has some desired property, a depth-first search may never find a
solution if it enters a cycle in the graph. Rather than avoiding cycles (i.e.
never extend a path with a node it already contains), iterative deepening
explores all paths up to length (or "depth") N, starting from N=0 and increasing
N until a solution is found.
(2004-01-26)
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