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A TREE WITH A LOOPby dr. Paweł Pilarczyk The above photograph is a counterexample to the statement spread all over computer science which says that no tree has loops. The counterexample was found at the Appalachian Trail in Georgia, U.S.A., on November 30, 2002. The author of the photograph expects that this discovery will deeply impact the understanding of the basics of graph theory and revolutionize the approach to computer science in general. |
