Bottom Schur functions

Details Bottom Schur functions Bottom Schur functions

2003-11-21

arxiv.org/abs/math/0311382v2

Mathematics

Combinatorics

16 pages, 13 figures To appear in the Electronic Journal of Combinatorics

Scientific paper

We give a basis for the space V spanned by the lowest degree part \hat{s}_\lambda of the expansion of the Schur symmetric functions s_\lambda in terms of power sums, where we define the degree of the power sum p_i to be 1. In particular, the dimension of the subspace V_n spanned by those \hat{s}_\lambda for which \lambda is a partition of n is equal to the number of partitions of n whose parts differ by at least 2. We also show that a symmetric function closely related to \hat{s}_\lambda has the same coefficients when expanded in terms of power sums or augmented monomial symmetric functions. Proofs are based on the theory of minimal border strip decompositions of Young diagrams.

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