This is a lightly edited version of an article written in 1989 but never fully completed. It was originally intended as a joint paper with A. J.Wassermann. 33 pages, 20 figures
An explicit isomorphism is constructed between the Birman-Wenzl algebra, defined algebraically by J. Birman and H. Wenzl using generators and relations, and the Kauffman algebra, constructed geometrically by H. R. Morton and P. Traczyk in terms of tangles. The isomorphism is obtained by constructing an explicit basis in the Birman-Wenzl algebra, analogous to a basis previously constructed for the Kauffman algebra using 'Brauer connectors'. The geometric isotopy arguments for the Kauffman algebra are systematically replaced by algebraic versions using the Birman-Wenzl relations.
We construct a new inductive basis of the Birman-Murakami-Wenzl algebra. Using it, we provide a new proof of the existence of the Markov trace on the BMW algebras affording the two-variable Kauffman polynomial. We prove also that all the transverse Markov traces on the BMW algebras are determined by the self-linking number, the HOMFLY-PT polynomial and the two-variable Kauffman polynomial.
The Birman-Wenzl-Murakami algebra, Hecke algebra and representations of U_{q}(osp(1|2n))
A representation of the Birman-Wenzl-Murakami algebra BW_{t} (-q^{2n},q) exists in the centraliser algebra End_{U_q(osp(1|2n))} (V^{ \otimes t}), where V is the fundamental (2n+1)-dimensional irreducible U_{q} (osp(1|2n))-module. This representation is defined using permuted R-matrices acting on V^{ \otimes t}. A complete set of projections onto and intertwiners between irreducible U_{q} (osp(1|2n))-summands of V^{ \otimes t} exists via this representation, proving that End_{U_q(osp(1|2n))} V^{ \otimes t}) is generated by the set of permuting R-matrices acting on V^{ \otimes t}. We also show t…
The centralizer of the image of the diagonal embedding of $U_q(\mathfrak{sl}_2)$ in the tensor product of three irreducible representations is examined in a Schur-Weyl duality spirit. The aim is to offer a description in terms of generators and relations. A conjecture in this respect is offered with the centralizers presented as quotients of the Askey-Wilson algebra. Support for the conjecture is provided by an examination of the representations of the quotients. The conjecture is also shown to be true in a number of cases thereby exhibiting in particular the Temperley-Lieb, Birman-Murakami-We…
On the freeness of the cyclotomic BMW algebras: admissibility and an isomorphism with the cyclotomic Kauffman tangle algebras
R. Häring-Oldenburg，是BMW代数与G（k，1，n）型分圆Hecke代数（又名Ariki-Koike代数）和B型纽结理论相关的推广。本文证明了该代数是自由的，秩为k^n（2n-1）！！在参数满足所谓的“容许条件”的基环上。这些条件是必要的，以使这些结果保持和最初产生的表示论的B_2 ^k，这是分析的作者在以前的文件。此外，我们得到了一个几何实现B_n^k作为一个分圆版本的考夫曼缠结代数，在仿射n-缠结在固体环面，并产生明确的基础，可以描述代数和图解。的容许条件是最普遍的文献中提供的，这些结果举行，他们是必要的和充分的所有结果一般n。
In this work, we extend some results from the Kauffman bracket and HOMFLYPT skein theories to the Kauffman (Dubrovnik) skein theory. A definition is given for ``power sum" type elements $\widetilde{P}_k$ in the Dubrovnik skein algebra of the annulus $\mathcal{D}(A)$. These elements generalize the Chebyshev polynomials often used when studying Kauffman bracket skein algebras. Threadings of the $\widetilde{P}_k$ are used as generators in a presentation of the Dubrovnik skein algebra of the torus $\mathcal{D}(T^2)$, where they are shown to satisfy simple relations. This description of $\mathcal{D…
