Abstract
The mixed braid groups \(B_{2,n}, \ n \in \mathbb {N}\), with two fixed strands and n moving ones, are known to be related to the knot theory of certain families of 3-manifolds. In this paper, we define the mixed Hecke algebra \(\mathrm {H}_{2,n}(q)\) as the quotient of the group algebra \({\mathbb Z}\, [q^{\pm 1}] \, B_{2,n}\) over the quadratic relations of the classical Iwahori–Hecke algebra for the braiding generators. We further provide a potential basis \(\Lambda _n\) for \(\mathrm {H}_{2,n}(q)\), which we prove is a spanning set for the \(\mathbb {Z}[q^{\pm 1}]\)-additive structure of this algebra. The sets \(\Lambda _n,\ n \in \mathbb {Z}\) appear to be good candidates for an inductive basis suitable for the construction of Homflypt-type invariants for knots and links in the above 3-manifolds.
Similar content being viewed by others
References
Buck, D., Mauricio,M.: Connect sum of lens spaces surgeries: application to Hin recombination, Math. Proc. Camb. Philos. Soc. 505–525 (2011). https://doi.org/10.1017/S0305004111000090
Diamantis, I., Lambropoulou, S.: Braid equivalences in 3-manifolds with rational surgery description. Topol. Appl. (2015). https://doi.org/10.1016/j.topol.2015.08.009
Diamantis, I., Lambropoulou, S., Przytycki, J.H.: Topological steps towards the Homflypt skein module of \(L(p,1)\) via braids. J. Knot Theory Ramif. 25, 14 (2016). 1650084
Gügümcü, N., Kauffman, L.H.: New invariants of knotoids. Eur. J. Combin. 65C, 186–229 (2017)
Goundaroulis, D., Dorier, J., Benedetti, F., Stasiak, A.: Studies of global and local entanglements of individual protein chains using the concept of knotoids. Sci. Rep. 7, 6309 (2017)
Goundaroulis, D., Gügümcü, N., Lambropoulou, S., Dorier, J., Stasiak, A., Kauffman, L.H., Topological models for open knotted protein chains using the concepts of knotoids and bonded knotoids. In: Racko, D., Stasiak, A., (Eds.) Polymers, Polymers Special issue on Knotted and Catenated Polymers, Vol. 9(9), pp. 444 (2017). https://doi.org/10.3390/polym9090444
Häring-Oldenburg, R., Lambropoulou, S.: Knot theory in handlebodies. J. Knot Theory Ramif. 11(6), 921–943 (2002)
Jones, V.F.R.: Hecke algebra representations of braid groups and link polynomials. Ann. Math. 126, 335–388 (1987)
Kodokostas, D., Lambropoulou,S.: Some Hecke-type algebras derived from the braid group with two fixed strands. In: Springer PROMS Series, Volume: Algebraic Modeling of Topological and Computational Structures and Applications, Vol. 219, pp. 177–187 (2017). https://doi.org/10.1007/9783319681030
Lambropoulou, S., Rourke, C.P.: Markov’s theorem in 3-manifolds. Topol. Appl. 78, 95–122 (1997)
Lambropoulou, S., Rourke, C.P.: Algebraic Markov equivalence for links in \(3\)-manifolds. Compos. Math. 142, 1039–1062 (2006)
Lambropoulou, S.: Knot theory related to generalized and cyclotomic Hecke algebras of type B. J. Knot Theory Ramif. 8(5), 621–658 (1999)
Lambropoulou, S.: Braid structures in knot complements, handlebodies and 3–manifolds. In: Proceedings of the Conference Knots in Hellas ’98, Series on Knots and Everything, vol. 24, pp. 274–289 (2000)
Turaev V.: Knotoids. Osaka J. Math. 49, 195–223 (2012)
Author information
Authors and Affiliations
Corresponding author
Additional information
This research has been co-financed by the European Union (European Social Fund-ESF) and Greek national funds through the Operational Program “Education and Lifelong Learning” of the National Strategic Reference Framework (NSRF)—Research Funding Program: THALES: Reinforcement of the interdisciplinary and/or inter-institutional research and innovation.
Rights and permissions
About this article
Cite this article
Kodokostas, D., Lambropoulou, S. A Spanning Set and Potential Basis of the Mixed Hecke Algebra on Two Fixed Strands. Mediterr. J. Math. 15, 192 (2018). https://doi.org/10.1007/s00009-018-1240-7
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/s00009-018-1240-7