 | ECS #781: A simple grammar |
| Introduction | Examples | Search | Submit | Help | Links |
1. Description
No description available
2. Specification
This unlabelled structure is specified as S in
\displaystyle
\left\{ B={\rm Sequence} \left( Z,1\leq {\rm card} \right) ,C={\rm
Union} \left( B,Z \right) ,S={\rm PowerSet} \left( C \right) \right\}
other formats
3. Coefficients
3.1. First terms
4. Ordinary generating function
\displaystyle
{{\rm e}^{\sum _{j_{{1}}=1}^{\infty }-{\frac { \left( -1 \right) ^{j_{{
1}}}{x}^{j_{{1}}} \left( -2+{x}^{j_{{1}}} \right) }{ \left( -1+{x}^{j_{
{1}}} \right) j_{{1}}}}}}
other formats
5. References
6. Random structure
Search a combinatorial structure by: (firstTerms should be a sequence of integers, separated by commas).