 | ECS #786: A simple grammar |
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1. Description
pairs of Cycles of Sequences
2. Specification
This unlabelled structure is specified as S in
\displaystyle
\left\{ B={\rm Sequence} \left( Z,1\leq {\rm card} \right) ,C={\rm
Cycle} \left( B \right) ,S={\rm Prod} \left( C,C \right) \right\}
other formats
3. Coefficients
3.1. First terms
4. Ordinary generating function
\displaystyle
\left( \sum _{j_{{1}}=1}^{\infty }{\rm phi} \left( j_{{1}} \right)
\ln \left( \left( 1+{\frac {{x}^{j_{{1}}}}{-1+{x}^{j_{{1}}}}}
\right) ^{-1} \right) {j_{{1}}}^{-1} \right) ^{2}
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).