{
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  "body": "\n## Summary\n\nA leaf vertex or pendant vertex (especially in a tree) is a vertex whose degree is $1$. A leaf edge or pendant edge is the edge connecting a leaf vertex to its single neighbour.\n\nA leaf power of a tree is a graph whose vertices are the leaves of the tree and whose edges connect leaves whose distance in the tree is at most a given threshold.\n",
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        "locator": "Glossary of graph theory, section L",
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  "name": "Leaf",
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        "what": "edge defines in",
        "note": "at least one definition",
        "have": 0,
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        "what": "edge instance_of in",
        "note": "at least two examples",
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      {
        "what": "edge not_instance_of in",
        "note": "at least one non-example",
        "have": 0,
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      },
      {
        "what": "edge specializes both",
        "note": "the more general notions and the special cases",
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