GammaNumber on CartanType
The gamma number of the Weyl group, from the sum of the squares of its exponents e: γ = 6 Σ e² / n - h² + h.
Called as CombinatorialStat(x, "GammaNumber"). The head's page has its examples.
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FindStat St001676
The gamma number of the Weyl group of a Cartan type.
| Object | Value |
|---|---|
['A',1] | 4 |
['A',2] | 9 |
['A',3] | 16 |
['A',4] | 25 |
['A',5] | 36 |
['A',6] | 49 |
['A',7] | 64 |
['A',8] | 81 |
Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St001676 has the rest.