On irreducible characters of the Iwahori-Hecke algebra in type
arXiv:2104.06067 · doi:10.1016/j.jalgebra.2022.01.020
Abstract
We use vertex operators to compute irreducible characters of the Iwahori-Hecke algebra of type . Two general formulas are given for the irreducible characters in terms of those of the symmetric groups or the Iwahori-Hecke algebras in lower degrees. Explicit formulas are derived for the irreducible characters labeled by hooks and two-row partitions. Using duality, we also formulate a determinant type Murnaghan-Nakayama formula and give another proof of Ram's combinatorial Murnaghan-Nakayama formula. As applications, we study super-characters of the Iwahori-Hecke algebra as well as the bitrace of the regular representation and provide a simple proof of the Halverson-Luduc-Ram formula.
21 pages