English

Jucys-Murphy elements and Grothendieck groups for generalized rook monoids

Representation Theory 2022-07-26 v3

Abstract

We consider a tower of generalized rook monoid algebras over the field C\mathbb{C} of complex numbers and observe that the Bratteli diagram associated to this tower is a simple graph. We construct simple modules and describe Jucys-Murphy elements for generalized rook monoid algebras. Over an algebraically closed field k\Bbbk of positive characteristic pp, utilizing Jucys-Murphy elements of rook monoid algebras, for 0ip10\leq i\leq p-1 we define the corresponding ii-restriction and ii-induction functors along with two extra functors. On the direct sum GC\mathcal{G}_{\mathbb{C}} of the Grothendieck groups of module categories over rook monoid algebras over k\Bbbk, these functors induce an action of the tensor product of the universal enveloping algebra U(sl^p(C))U(\hat{\mathfrak{sl}}_p(\mathbb{C})) and the monoid algebra C[B]\mathbb{C}[\mathcal{B}] of the bicyclic monoid B\mathcal{B}. Furthermore, we prove that GC\mathcal{G}_{\mathbb{C}} is isomorphic to the tensor product of the basic representation of U(sl^p(C))U(\hat{\mathfrak{sl}}_{p}(\mathbb{C})) and the unique infinite-dimensional simple module over C[B]\mathbb{C}[\mathcal{B}], and also exhibit that GC\mathcal{G}_{\mathbb{C}} is a bialgebra. Under some natural restrictions on the characteristic of k\Bbbk, we outline the corresponding result for generalized rook monoids.

Cite

@article{arxiv.2104.13632,
  title  = {Jucys-Murphy elements and Grothendieck groups for generalized rook monoids},
  author = {Volodymyr Mazorchuk and Shraddha Srivastava},
  journal= {arXiv preprint arXiv:2104.13632},
  year   = {2022}
}

Comments

Minor changes and added a few more references. Comments welcome!

R2 v1 2026-06-24T01:35:30.372Z