 | ECS #57: Trees |
| Introduction | Examples | Search | Submit | Help | Links |
1. Description
Rooted, non plane, unlabelled Trees
2. Specification
This unlabelled structure is specified as S in
\displaystyle
\left\{ S={\rm Prod} \left( Z,{\rm Set} \left( S \right) \right)
\right\}
other formats
3. Coefficients
3.1. First terms
4. Ordinary generating function
\displaystyle
[S \left( x \right) =x{{\rm e}^{\sum _{j_{{1}}=1}^{\infty }{\frac {S
\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).