Stirling numbers of the second kind
Stirling numbers of the second kind
Numbers parameterizing ways to partition a set.
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Readers' pathsAug 2026 – Oct 2026
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Bell number
Count of the possible partitions of a set.
19%
Touchard polynomials
Sequence of polynomials.
5.1%
Ordered Bell number
Number of orderings allowing ties.
4.4%
Hasse diagram
Visual depiction of a partially ordered set.
3.2%
Partition of a set
Mathematical ways to group elements of a set.
2.6%
Combinatorics
Branch of discrete mathematics.
1.7%
Inclusion–exclusion principle
Counting technique in combinatorics.
0.99%
Integer partition
Decomposition of an integer as a sum of positive integers.
0.72%
Readers come from
Share of the 1,976 readers arriving from another article
Bell number
Count of the possible partitions of a set.
10%
Coupon collector's problem
Problem in probability theory.
6.1%
Partition of a set
Mathematical ways to group elements of a set.
5%
Bloom filter
Data structure for approximate set membership.
3.4%
Binomial distribution
Probability distribution.
3%
Touchard polynomials
Sequence of polynomials.
2.9%
Poisson distribution
Discrete probability distribution.
2.3%
Eulerian number
Polynomial sequence.
2.1%
Polylogarithm
Special mathematical function.
1.9%
Bernoulli number
Rational number sequence.
1.4%