• Corpus ID: 119595235

Character polynomials for two rows and hook partitions

@article{Ashraf2018CharacterPF,
  title={Character polynomials for two rows and hook partitions},
  author={Ahmed Umer Ashraf},
  journal={arXiv: Combinatorics},
  year={2018}
}

• A. Ashraf
• Published 21 December 2018
• Mathematics
• arXiv: Combinatorics

Representation theory of the symmetric group $\mathfrak{S}_n$ has a very distinctive combinatorial flavor. The conjugacy classes as well as the irreducible characters are indexed by integer partitions $\lambda \vdash n$. We introduce class functions on $\mathfrak{S}_n$ that count the number of certain tilings of Young diagrams. The counting interpretation gives a uniform expression of these class functions in the ring of character polynomials, as defined by \cite{murnaghanfirst}. A modern treatment of character polynomials is given in \cite{orellana-zabrocki}. We prove a relation between these combinatorial class functions in the (virtual) character ring. From this relation, we were able to prove Goupil's generating function identity \cite{goupil}, which can then be used to derive Rosas' formula \cite{rosas} for Kronecker coefficients of hook shape partitions and two row partitions.