2025/05/03 by Marino Romero, Romero, Marino, Joshua Jeishing Wen +1 · 1 citation
Mathematics · #Advanced Combinatorial Mathematics #Advanced Mathematical Identities #Algebraic structures and combinatorial models
paper · pdf · doi:10.48550/arxiv.2505.01732
We give an explicit formula for an operator that sends a wreath Macdonald polynomial to the delta function at a character associated to its partition. This allows us to prove many new results for wreath Macdonald polynomials, especially pertaining to reciprocity: Macdonald--Koornwinder duality, evaluation formulas, etc. Additionally, we initiate the study of wreath interpolation Macdonald polynomials, derive a plethystic formula for wreath (q,t)-Kostka coefficients, and present series solutions to the bispectral problem involving wreath Macdonald operators. Our approach is to use the eigenoperators for wreath Macdonald polynomials that have been produced from quantum toroidal and shuffle algebras.