The construction of trigonometric invariants for Weyl groups and the derivation of corresponding exactly solvable Sutherland models
Oliver Haschke, Werner Ruehl
Abstract
Trigonometric invariants are defined for each Weyl group orbit on the root lattice. They are real and periodic on the coroot lattice. Their polynomial algebra is spanned by a basis which is calculated by means of an algorithm. The invariants of the basis can be used as coordinates in any cell of the coroot space and lead to an exactly solvable model of Sutherland type. We apply this construction to the F4 case
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