Category:Trees (structure)
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es:Category:Árboles (estructura) In graph theory, a tree is a graph in which any two points, or vertices, are connected by exactly one path (i.e. there are no cycles). A forest is a graph in which any two vertices are connected by at most one path. An equivalent definition is that a forest is graph of one or more (unconnected) trees (hence the name). Trees are useful abstract structural representations of many different concepts.