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The nil-blob algebra: An incarnation of type A˜1 Soergel calculus and of the truncated blob algebra
Journal of Algebra ( IF 0.8 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.jalgebra.2020.11.021
Diego Lobos , David Plaza , Steen Ryom-Hansen

We introduce a type $B$ 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 isomorphic to the endomorphism algebra of a Bott-Samelson bimodule in type $\tilde{A}_1$. We also prove that it is isomorphic to an idempotent truncation of the classical blob algebra.Thus we provide strong evidence in favor of the recent Blob vs. Soergel conjecture.

中文翻译:

nil-blob 代数:A~1 型 Soergel 演算和截断 blob 代数的化身

我们在生成器和关系方面引入了 nil Temperley-Lieb 代数的 $B$ 类型,我们称之为(扩展的)nil-blob 代数。我们证明该代数与 $\tilde{A}_1$ 类型的 Bott-Samelson 双模的自同构代数同构。我们还证明了它与经典 blob 代数的幂等截断是同构的。因此,我们提供了支持最近的 Blob vs. Soergel 猜想的有力证据。
更新日期:2021-03-01
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