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“>In advanced mathematics, a graph is a special data structure made upof lines (called edges) connected together at endpoints (calledvertices or nodes). This definition of the term graphis in contrast to a popular definition used in early math classes, where a graphis simply a plot of a function.Many computer science and mathematical algorithms make use of graphs. Becausegraphs are so important in many algorithms, a data structure for a graph isequally important. Most languages don 
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