English

On the annihilator ideal in the $bt$-algebra of tensor space

Representation Theory 2021-11-15 v3

Abstract

We study the representation theory of the braids and ties algebra, or the btbt-algebra, E \cal E. Using the cellular basis {mst}\{m_{{\mathfrak s} {\mathfrak t}} \} for E \cal E obtained in previous joint work with J. Espinoza we introduce two kinds of permutation modules M(λ)M(\lambda) and M(Λ) M(\Lambda) for E\cal E. We show that the tensor product module VnV^{\otimes n} for E\cal E is a direct sum of M(λ) M(\lambda)'s. We introduce the dual cellular basis {nst}\{n_{{\mathfrak s} {\mathfrak t}} \} for E \cal E and study its action on M(λ) M(\lambda) and M(Λ) M(\Lambda ) . We show that the annihilator ideal I \cal I in E \cal E of Vn V^{\otimes n } enjoys a nice compatibility property with respect to {nst}\{n_{{\mathfrak s} {\mathfrak t}} \}. We finally study the quotient algebra E/I {\cal E}/{\cal I} , showing in particular that it is a simultaneous generalization of H\"arterich's 'generalized Temperley-Lieb algebra' and Juyumaya's 'partition Temperley-Lieb algebra'.

Keywords

Cite

@article{arxiv.2105.00099,
  title  = {On the annihilator ideal in the $bt$-algebra of tensor space},
  author = {Steen Ryom-Hansen},
  journal= {arXiv preprint arXiv:2105.00099},
  year   = {2021}
}

Comments

23 pages. Final version accepted for publication in JPAA