A node which is one graph edge further away from a given node in a rooted tree.
See alsoRoot Vertex, Rooted Tree, Sibling
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ReferencesKnuth, D. E. "Trees." §2.3 in The Art of Computer Programming, Vol. 1: Fundamental Algorithms, 3rd ed. Reading, MA: Addison-Wesley, p. 311, 1997.
Referenced on Wolfram|AlphaChild
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Weisstein, Eric W. "Child." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Child.html