Schur function identities, their t-analogs, and k-Schur irreducibility

Details Schur function identities, their t-analogs, and k-Schur irreducibility Schur function identities, their t-analogs, and k-Schur irreducibility

2001-11-17

arxiv.org/abs/math/0111193v1

Mathematics

Combinatorics

18 pages

Scientific paper

We obtain general identities for the product of two Schur functions in the case where one of the functions is indexed by a rectangular partition, and give their t-analogs using vertex operators. We study subspaces forming a filtration for the symmetric function space that lends itself to generalizing the theory of Schur functions and also provides a convenient environment for studying the Macdonald polynomials. We use our identities to prove that the vertex operators leave such subspaces invariant. We finish by showing that these operators act simply on the k-Schur functions, thus leading to a concept of irreducibility for these functions.

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