activity
20022025
most citedKoszul duality of translation--and Zuckerman functors

28 citations · 65 across the 21 of their papers we have counts for

collaborators

26 papers

math.RT2025

A KLR-like presentation for the bt-algebra

Steen Ryom-Hansen

We consider the bt-algebra of knot theory, defined over an arbitrary field . We find a KLR-like presentation for showing that it…

math.RT2024

On the spherical partition algebra

Katherine Ormeño Bastías, Paul Martin, Steen Ryom-Hansen

For we introduce an idempotent subalgebra, the spherical partition algebra , of the partition algebra , that we define…

math.RT2023

Seminormal forms for the Temperley-Lieb algebra

Katherine Ormeño Bastías, Steen Ryom-Hansen

Let be the rational Temperley-Lieb algebra, with loop parameter . In the first part of the paper we study the seminormal idempotents $ E_{ \m…

math.RT2022

Graded sum formula for -Soergel calculus and the nil-blob algebra

Marcelo Hernández Caro, Steen Ryom-Hansen

We study the representation theory of the Soergel calculus algebra $ A_w := \mbox{End}_{{\mathcal D}_{(W,S)}} (\underline{w}) $ over in type . We generaliz…

math.RT2021

On the annihilator ideal in the -algebra of tensor space

Steen Ryom-Hansen

We study the representation theory of the braids and ties algebra, or the -algebra, . Using the cellular basis for obt…

math.RT2020★ 2 cited

The nil-blob algebra: An incarnation of type Soergel calculus and of the truncated blob algebra

Diego Lobos, David Plaza, Steen Ryom-Hansen

We introduce a type analogue of the nil Temperley-Lieb algebra in terms of generators and relations, that we call the (extended) nil-blob algebra. We show that this algebra is…