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# networkx.algorithms.cuts.node_expansion¶

node_expansion(G, S)[source]

Returns the node expansion of the set S.

The node expansion is the quotient of the size of the node boundary of S and the cardinality of S. [1]

Parameters: G (NetworkX graph) S (sequence) – A sequence of nodes in G. The node expansion of the set S. number

References

 [1] Vadhan, Salil P. “Pseudorandomness.” Foundations and Trends in Theoretical Computer Science 7.1–3 (2011): 1–336.