Minuscule reverse plane partitions via quiver representations

• Alexander Garver ^[1] ; Rebecca Patrias ^[2] ; Hugh Thomas ^[1]
  1. [1] University of Quebec at Montreal

     University of Quebec at Montreal

     Canadá

     
  2. [2] University of St. Thomas

     University of St. Thomas

     City of Saint Paul, Estados Unidos

     
• Localización: Selecta Mathematica, New Series, ISSN 1022-1824, Vol. 29, Nº. 3, 2023
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • A nilpotent endomorphism of a quiver representation induces a linear transformation on the vector space at each vertex. Generically among all nilpotent endomorphisms, there is a well-defined Jordan form for these linear transformations, which is an interesting new invariant of a quiver representation. If Q is a Dynkin quiver and m is a minuscule vertex, we show that representations consisting of direct sums of indecomposable representations all including m in their support, the category of which we denote by CQ,m, are determined up to isomorphism by this invariant. We use this invariant to define a bijection from isomorphism classes of representations in CQ,m to reverse plane partitions whose shape is the minuscule poset corresponding to Q and m. By relating the piecewise-linear promotion action on reverse plane partitions to Auslander–Reiten translation in the derived category, we give a uniform proof that the order of promotion equals the Coxeter number. In type An, we show that special cases of our bijection include the Robinson–Schensted–Knuth and Hillman–Grassl correspondences.