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• W3157942185 abstract "The higher rank Racah algebra $R(n)$ introduced recently is recalled. A quotient of this algebra by central elements, which we call the special Racah algebra $sR(n)$, is then introduced. Using results from classical invariant theory, this $sR(n)$ algebra is shown to be isomorphic to the centralizer $Z_{n}(mathfrak{sl}_2)$ of the diagonal embedding of $U(mathfrak{sl}_2)$ in $U(mathfrak{sl}_2)^{otimes n}$. This leads to a first and novel presentation of the centralizer $Z_{n}(mathfrak{sl}_2)$ in terms of generators and defining relations. An explicit formula of its Hilbert-Poincare series is also obtained and studied. The extension of the results to the study of the special Askey-Wilson algebra and its higher rank generalizations is discussed." @default.
• W3157942185 created "2021-05-10" @default.
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• W3157942185 date "2021-05-03" @default.
• W3157942185 modified "2023-10-01" @default.
• W3157942185 title "Racah algebras, the centralizer $Z_n(mathfrak{sl}_2)$ and its Hilbert-Poincar'e series" @default.
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• W3157942185 hasPublicationYear "2021" @default.
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