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Small Set Partitions


	This Demonstration shows the partitions of the set into blocks, where and are small. For example, you could split into the blocks , , and . This is written compactly as . The number of ways of partitioning a set of elements into nonempty subsets (or blocks) is the Stirling number of the second kind, . The total number of ways to partition a set into blocks is the Bell number .


	Contributed by: George Beck
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Set Partition (Wolfram MathWorld)

Bell Number (Wolfram MathWorld)

Stirling Number of the Second Kind (Wolfram MathWorld)

"Small Set Partitions" from The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/SmallSetPartitions/

Contributed by: George Beck

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