Identifier
Identifier
Values
['A',1] generating graphics... => 2
['A',2] generating graphics... => 3
['B',2] generating graphics... => 3
['G',2] generating graphics... => 4
['A',3] generating graphics... => 4
['B',3] generating graphics... => 5
['C',3] generating graphics... => 4
['A',4] generating graphics... => 5
['B',4] generating graphics... => 7
['C',4] generating graphics... => 5
['D',4] generating graphics... => 6
['F',4] generating graphics... => 9
['A',5] generating graphics... => 6
['B',5] generating graphics... => 9
['C',5] generating graphics... => 6
['D',5] generating graphics... => 8
['A',6] generating graphics... => 7
['B',6] generating graphics... => 11
['C',6] generating graphics... => 7
['D',6] generating graphics... => 10
['E',6] generating graphics... => 12
['A',7] generating graphics... => 8
['B',7] generating graphics... => 13
['C',7] generating graphics... => 8
['D',7] generating graphics... => 12
['E',7] generating graphics... => 18
['A',8] generating graphics... => 9
['B',8] generating graphics... => 15
['C',8] generating graphics... => 9
['D',8] generating graphics... => 14
['E',8] generating graphics... => 30
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Description
The dual Coxeter number of a finite Cartan type.
References
[1] Humphreys, J. What role does the "dual Coxeter number" play in Lie theory (and should it be called the "Kac number")? MathOverflow:25592
Code
def statistic(C):
    return C.dual_coxeter_number()

Created
Apr 20, 2018 at 20:27 by Martin Rubey
Updated
Apr 20, 2018 at 20:27 by Martin Rubey