 | ECS #850: A simple grammar |
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1. Description
No description available
2. Specification
This unlabelled structure is specified as S in
\displaystyle
\left\{ B={\rm Sequence} \left( C,1\leq {\rm card} \right) ,C={\rm
Prod} \left( Z,S \right) ,S={\rm PowerSet} \left( B \right) \right\}
other formats
3. Coefficients
3.1. First terms
4. Ordinary generating function
\displaystyle
[B \left( x \right) = \left( 1-C \left( x \right) \right) ^{-1}-1,C
\left( x \right) =xS \left( x \right) ,S \left( x \right) ={{\rm e}^{
\sum _{j_{{1}}=1}^{\infty }-{\frac { \left( -1 \right) ^{j_{{1}}}B
\left( {x}^{j_{{1}}} \right) }{j_{{1}}}}}},Z \left( x \right) =x]
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).