Identifier
- St000859: Finite Cartan types ⟶ ℤ
Values
=>
Cc0022;cc-rep
['A',1]=>3
['A',2]=>16
['B',2]=>25
['G',2]=>49
['A',3]=>125
['B',3]=>343
['C',3]=>343
['A',4]=>1296
['B',4]=>6561
['C',4]=>6561
['D',4]=>2401
['F',4]=>28561
['A',5]=>16807
['B',5]=>161051
['C',5]=>161051
['D',5]=>59049
['A',6]=>262144
['B',6]=>4826809
['C',6]=>4826809
['D',6]=>1771561
['E',6]=>4826809
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Description
The number of parking functions of a finite Cartan type.
This is given by the size of the finite torus $Q / (h+1)Q$ where $Q$ is the root lattice. This is known to be equal to $(h+1)^n$ where $n$ is the rank and $h$ is the Coxeter number. See also [1, 2] for the Weyl group action on this finite torus.
This is given by the size of the finite torus $Q / (h+1)Q$ where $Q$ is the root lattice. This is known to be equal to $(h+1)^n$ where $n$ is the rank and $h$ is the Coxeter number. See also [1, 2] for the Weyl group action on this finite torus.
References
[1] Haiman, M. D. Conjectures on the quotient ring by diagonal invariants MathSciNet:1256101
[2] Armstrong, D., Reiner, V., Rhoades, B. Parking spaces MathSciNet:3281144
[2] Armstrong, D., Reiner, V., Rhoades, B. Parking spaces MathSciNet:3281144
Created
Jun 25, 2017 at 19:50 by Christian Stump
Updated
Jun 25, 2017 at 19:50 by Christian Stump
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