Proceedings of the 28-th International Conference on Formal Power Series and Algebraic Combinatorics
4-8 Jul 2016 Vancouver, British Columbia (Canada)

Extended abstracts listed by author > Hamel Angele M.

Factorial Characters and Tokuyama's Identity for Classical Groups
Angele M. Hamel  1  , Ronald C. King  2  
1 : Department of Physics and Computer Science [Waterloo]
75 University Avenue West, Waterloo, Ontario N2L 3C5 -  Canada
2 : School of Mathematics [Southampton]  -  Website
School of Mathematics University of Southampton Highfield Southampton SO17 1BJ -  Royaume-Uni

In this paper we introduce factorial characters for the classical groups and derive a number of central results. Classically, the factorial Schur function plays a fundamental role in traditional symmetric function theory and also in Schubert polynomial theory. Here we develop a parallel theory for the classical groups, offering combinatorial definitions of the factorial characters for the symplectic and orthogonal groups, and further establish flagged factorial Jacobi-Trudi identities and factorial Tokuyama identities, providing proofs in the symplectic case. These identities are established by manipulating determinants through the use of certain recurrence relations and by using lattice paths. 

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