TerminalClosers on SetPartition
Closers e with every larger element also a closer.
Called as CombinatorialStat(x, "TerminalClosers"). The head's page has its examples.
Live
FindStat St001050
The number of terminal closers of a set partition.
| Object | Value |
|---|---|
{{1}} | 1 |
{{1,2}} | 1 |
{{1,2,3}} | 1 |
{{1},{2}} | 2 |
{{1,2,3,4}} | 1 |
{{1,2},{3}} | 2 |
{{1,3},{2}} | 2 |
{{1},{2,3}} | 1 |
Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St001050 has the rest.