Compound basis for the space of symmetric functions

Details Compound basis for the space of symmetric functions Compound basis for the space of symmetric functions

2007-05-21

arxiv.org/abs/0705.2932v1

Mathematics

Representation Theory

8 pages. submited RIMS Kokyuroku-Bessatsu

Scientific paper

The aim of this note is to introduce a compound basis for the space of symmetric functions. Our basis consists of products of Schur functions and $Q$-functions. The basis elements are indexed by the partitions. It is well known that the Schur functions form an orthonormal basis for our space. A natural question arises. How are these two bases connected? In this note we present some numerical results of the transition matrix for these bases. In particular we will see that the determinant of the transition matrix is a power of 2. This is not a surprising fact. However the explicit formula involves an interesting combinatorial feature. Our compound basis comes from the twisted homogeneous realization of the basic representation of the affine Lie algebras. This note is not written in a standard style of mathematical articles. It is more like a draft of a talk. In particular proofs are not given here. Details and proofs will be published elsewhere.

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