Английская Википедия:Cardinal tree
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A cardinal tree (or trie) of degree k, by analogy with cardinal numbers and by opposition with ordinal trees, is a rooted tree in which each node has Шаблон:Var positions for an edge to a child.[1] Each node has up to Шаблон:Var children and each child of a given node is labeled by a unique integer from the set {1, 2, . . . , k}. For instance, a binary tree is a cardinal tree of degree 2.
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