English

Quasiinvariants of $S_3$

Combinatorics 2007-05-23 v1 Commutative Algebra

Abstract

Let sijs_{ij} represent a tranposition in SnS_n. A polynomial PP in Q[Xn]\mathbb{Q}[X_n] is said to be mm-quasiinvariant with respect to SnS_n if (xixj)2m+1(x_i-x_j)^{2m+1} divides (1sij)P(1-s_{ij})P for all 1i,jn1 \leq i, j \leq n. We call the ring mm-quasiinvariants QIm[Xn]QI_m[X_n]. We describe a method for constructing a basis for the quotient QIm[X3]/<e1,e2,e3>QI_m[X_3]/< e_1, e_2, e_3>. This leads to the evaluation of certain binomial determinants that are interesting in their own right.

Keywords

Cite

@article{arxiv.math/0603482,
  title  = {Quasiinvariants of $S_3$},
  author = {Jason Bandlow and Gregg Musiker},
  journal= {arXiv preprint arXiv:math/0603482},
  year   = {2007}
}

Comments

18 pages, 2 figures, presented at 2004 Joint Meetings of the AMS and MAA