 | ECS #41: Ordered set partitions, Balls and Urns |
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1. Description
- Ordered set partitions
- surjections (Preferential arrangements)
- Ways to place balls into urns: distinguishable balls and distinguishable urns
2. Specification
This labelled structure is specified as S in
\displaystyle
\left\{ S={\rm Sequence} \left( {\rm Set} \left( Z,1\leq {\rm card}
\right) \right) \right\}
other formats
3. Coefficients
3.1. First terms
3.2. Asymptotics
4. Exponential generating function
\displaystyle
- \left( -2+{{\rm e}^{x}} \right) ^{-1}
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).