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：2025/12/05
Stirling number of the second kind
（ plural ）
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(mathematics) The number of ways to partition a set of n objects into k non-empty subsets, denoted by S(n,k).
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Stirling number of the second kind
When counting the partitions of a five-element set into two nonempty subsets, we compute the Stirling number of the second kind S(5,2).
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When counting the partitions of a five-element set into two nonempty subsets, we compute the Stirling number of the second kind S(5,2).
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