Symmetric functions, codes of partitions and the KP hierarchy

Details Symmetric functions, codes of partitions and the KP hierarchy Symmetric functions, codes of partitions and the KP hierarchy

2009-02-25

arxiv.org/abs/0902.4441v1

Mathematics

Combinatorics

Scientific paper

We consider an operator of Bernstein for symmetric functions, and give an explicit formula for its action on an arbitrary Schur function. This formula is given in a remarkably simple form when written in terms of some notation based on the code of a partition. As an application, we give a new and very simple proof of a classical result for the KP hierarchy, which involves the Plucker relations for Schur function coefficients in a tau function for the hierarchy. This proof is especially compact because of a restatement that we give for the Plucker relations that is symmetrical in terms of partition code notation.

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