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2. Wreath Macdonald polynomials as eigenstates

   https://doi.org/10.1007/s00029-025-01059-0  

   Wen, Joshua Jeishing (July 2025, Selecta Mathematica)

   Abstract We show that the wreath Macdonald polynomials for$$\mathbb {Z}/\ell \mathbb {Z}\wr \Sigma _n$$ $Z/\ell Z\wr {\Sigma }_n$, when naturally viewed as elements in the vertex representation of the quantum toroidal algebra$$U_{\mathfrak {q},\mathfrak {d}}(\ddot{\mathfrak {sl}}_\ell )$$ $U_{q,d}\left({\ddot{\mathrm{sl}}}_{\ell }\right)$, diagonalize its horizontal Heisenberg subalgebra. Our proof makes heavy use of shuffle algebra methods, and we also obtain a new proof of existence of wreath Macdonald polynomials. 

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