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Elliptic Ruijsenaars difference operators, symmetric polynomials, and Wess–Zumino–Witten fusion rings

    1. [1] Universidad de Talca

      Universidad de Talca

      Provincia de Talca, Chile

    2. [2] University of Groningen

      University of Groningen

      Países Bajos

  • Localización: Selecta Mathematica, New Series, ISSN 1022-1824, Vol. 29, Nº. 5, 2023
  • Idioma: inglés
  • Enlaces
  • Resumen
    • The fusion ring for sl(n)m Wess–Zumino–Witten conformal field theories is known to be isomorphic to a factor ring of the ring of symmetric polynomials presented by Schur polynomials. We introduce a deformation of this factor ring associated with eigenpolynomials for the elliptic Ruijsenaars difference operators. The corresponding Littlewood–Richardson coefficients are governed by a Pieri rule stemming from the eigenvalue equation. The orthogonality of the eigenbasis gives rise to an analog of the Verlinde formula. In the trigonometric limit, our construction recovers the refined sl(n)m Wess–Zumino–Witten fusion ring associated with the Macdonald polynomials.


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