S. Ryom-Hansen

collaborators

3 papers

math.RT2025

A KLR-like presentation for the bt-algebra

Steen Ryom-Hansen

We consider the bt-algebra $E_{n} (q)$ of knot theory, defined over an arbitrary field $k$ . We find a KLR-like presentation for $E_{n} (q)$ showing that it…

math.RT2024

On the spherical partition algebra

Katherine OrmeÃ±o BastÃas, Paul Martin, Steen Ryom-Hansen

For $k \in N$ we introduce an idempotent subalgebra, the spherical partition algebra $S P_{k}$ , of the partition algebra $P_{k}$ , that we define…

math.RT2024

Seminormal forms for the Temperley-Lieb algebra

Katherine OrmeÃ±o BastÃas, Steen Ryom-Hansen

Let $TL_{n}^{Q}$ be the rational Temperley-Lieb algebra, with loop parameter $2$ . In the first part of the paper we study the seminormal idempotents $ E_{ \m…