Vertex operators and the class algebras of symmetric groups

Details Vertex operators and the class algebras of symmetric groups Vertex operators and the class algebras of symmetric groups

2001-02-06

arxiv.org/abs/math/0102041v2

Mathematics

Combinatorics

23 pages, LaTex. Minor typos corrected

Scientific paper

We exhibit a vertex operator which implements multiplication by power-sums of Jucys-Murphy elements in the centers of the group algebras of all symmetric groups simultaneously. The coefficients of this operator generate a representation of ${\cal W}_{1+\infty}$, to which operators multiplying by normalized conjugacy classes are also shown to belong. A new derivation of such operators based on matrix integrals is proposed, and our vertex operator is used to give an alternative approach to the polynomial functions on Young diagrams introduced by Kerov and Olshanski.

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