+A [Subgraph](/wiki/subgraph) is a fundamental concept in [Graph Theory](/wiki/graph_theory), representing a portion of a larger [Graph](/wiki/graph). It consists of a subset of the original graph's vertices and all the edges connecting them that are also part of the larger graph. Imagine a smaller network contained within a bigger one.
+## See also
+- [Graph Theory](/wiki/graph_theory)
+- [Graph](/wiki/graph)
+- [Vertex](/wiki/vertex)
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