scholarly journals Topological steps toward the Homflypt skein module of the lens spaces L(p,1) via braids

2016 ◽  
Vol 25 (14) ◽  
pp. 1650084 ◽  
Author(s):  
Ioannis Diamantis ◽  
Sofia Lambropoulou ◽  
Jozef H. Przytycki
Keyword(s):  
Infinite System ◽  
Solid Torus ◽  
Lens Spaces ◽  
System Of Equations ◽  
Closed Curves ◽  
Skein Modules ◽  
Skein Module ◽  
Basic Set ◽  
Knots And Links ◽  
Shed Light

In this paper, we work toward the Homflypt skein module of the lens spaces [Formula: see text], [Formula: see text] using braids. In particular, we establish the connection between [Formula: see text], the Homflypt skein module of the solid torus ST, and [Formula: see text] and arrive at an infinite system, whose solution corresponds to the computation of [Formula: see text]. We start from the Lambropoulou invariant [Formula: see text] for knots and links in ST, the universal analog of the Homflypt polynomial in ST, and a new basis, [Formula: see text], of [Formula: see text] presented in [I. Diamantis and S. Lambropoulou, A new basis for the Homflypt skein module of the solid torus, J. Pure Appl. Algebra 220(2) (2016) 577–605, http://dx.doi.org/10.1016/j.jpaa.2015.06.014 , arXiv:1412.3642 [math.GT]]. We show that [Formula: see text] is obtained from [Formula: see text] by considering relations coming from the performance of braid band move(s) [bbm] on elements in the basis [Formula: see text], where the bbm are performed on any moving strand of each element in [Formula: see text]. We do that by proving that the system of equations obtained from diagrams in ST by performing bbm on any moving strand is equivalent to the system obtained if we only consider elements in the basic set [Formula: see text]. The importance of our approach is that it can shed light on the problem of computing skein modules of arbitrary c.c.o. [Formula: see text]-manifolds, since any [Formula: see text]-manifold can be obtained by surgery on [Formula: see text] along unknotted closed curves. The main difficulty of the problem lies in selecting from the infinitum of band moves some basic ones and solving the infinite system of equations.

scholarly journals An important step for the computation of the HOMFLYPT skein module of the lens spaces L(p,1) via braids

2019 ◽  
Vol 28 (11) ◽  
pp. 1940007 ◽  
Author(s):  
Ioannis Diamantis ◽  
Sofia Lambropoulou
Keyword(s):  
Infinite System ◽  
Solid Torus ◽  
Lens Spaces ◽  
System Of Equations ◽  
Skein Module ◽  
Knots And Links

We prove that, in order to derive the HOMFLYPT skein module of the lens spaces [Formula: see text] from the HOMFLYPT skein module of the solid torus, [Formula: see text], it suffices to solve an infinite system of equations obtained by imposing on the Lambropoulou invariant [Formula: see text] for knots and links in the solid torus, braid band moves that are performed only on the first moving strand of elements in a set [Formula: see text], augmenting the basis [Formula: see text] of [Formula: see text].

KNOTS IN THE SOLID TORUS UP TO 6 CROSSINGS

2012 ◽  
Vol 21 (11) ◽  
pp. 1250106 ◽  
Author(s):  
BOŠTJAN GABROVŠEK ◽  
MACIEJ MROCZKOWSKI
Keyword(s):  
Jones Polynomial ◽  
Solid Torus ◽  
Skein Modules ◽  
Skein Module ◽  
Almost All

We classify non-affine, prime knots in the solid torus up to 6 crossings. We establish which of these are amphicheiral: almost all knots with symmetric Jones polynomial are amphicheiral, but in a few cases we use stronger invariants, such as HOMFLYPT and Kauffman skein modules, to show that some such knots are not amphicheiral. Examples of knots with the same Jones polynomial that are different in the HOMFLYPT skein module are presented. It follows from our computations, that the wrapping conjecture is true for all knots up to 6 crossings.

The Dubrovnik and Kauffman skein modules of the lens spaces Lp,1

2018 ◽  
Vol 27 (03) ◽  
pp. 1840004 ◽  
Author(s):  
Maciej Mroczkowski
Keyword(s):  
Lens Spaces ◽  
Skein Modules ◽  
Skein Module

We compute the Dubrovnik skein module of the lens spaces [Formula: see text], [Formula: see text], as well as the Kauffman two variables skein module when [Formula: see text] is odd. We also show that there is torsion in the Kauffman skein module when [Formula: see text] is even.

scholarly journals ON THE S1 × S2 HOMFLY-PT INVARIANT AND LEGENDRIAN LINKS

2013 ◽  
Vol 22 (08) ◽  
pp. 1350040 ◽  
Author(s):  
MIKHAIL LAVROV ◽  
DAN RUTHERFORD
Keyword(s):  
Rational Function ◽  
Contact Structure ◽  
Solid Torus ◽  
Laurent Polynomial ◽  
Skein Modules ◽  
Skein Module ◽  
Tight Contact ◽  
Legendrian Links ◽  
Simple Basis

In [On the HOMFLY-PT skein module of S1 × S2, Math. Z. 237(4) (2001) 769–814], Gilmer and Zhong established the existence of an invariant for links in S1 × S2 which is a rational function in variables a and s and satisfies the HOMFLY-PT skein relations. We give formulas for evaluating this invariant in terms of a standard, geometrically simple basis for the HOMFLY-PT skein module of the solid torus. This allows computation of the invariant for arbitrary links in S1 × S2 and shows that the invariant is in fact a Laurent polynomial in a and z = s – s-1. Our proof uses connections between HOMFLY-PT skein modules and invariants of Legendrian links. As a corollary, we extend HOMFLY-PT polynomial estimates for the Thurston–Bennequin number to Legendrian links in S1 × S2 with its tight contact structure.

scholarly journals DETECTING TORSION IN SKEIN MODULES USING HOCHSCHILD HOMOLOGY

2006 ◽  
Vol 15 (02) ◽  
pp. 259-277 ◽  
Author(s):  
MICHAEL McLENDON
Keyword(s):  
Tensor Product ◽  
Spectral Sequence ◽  
Boundary Surface ◽  
Hochschild Homology ◽  
Heegaard Splitting ◽  
Common Boundary ◽  
Skein Modules ◽  
Skein Module ◽  
Hochschild Complex

Given a Heegaard splitting of a closed 3-manifold, the skein modules of the two handlebodies are modules over the skein algebra of their common boundary surface. The zeroth Hochschild homology of the skein algebra of a surface with coefficients in the tensor product of the skein modules of two handlebodies is interpreted as the skein module of the 3-manifold obtained by gluing the two handlebodies together along this surface. A spectral sequence associated to the Hochschild complex is constructed and conditions are given for the existence of algebraic torsion in the completion of the skein module of this 3-manifold.

Topology of ambient manifolds of non-singular Morse – Smale flows with three periodic orbits

2021 ◽  
Vol 29 (6) ◽  
pp. 863-868
Author(s):  
Danila Shubin ◽  
◽  
Keyword(s):  
Periodic Orbits ◽  
Three Dimensional ◽  
Solid Torus ◽  
Lens Space ◽  
Tubular Neighborhood ◽  
Lens Spaces ◽  
Ambient Manifold ◽  
Orientable Manifold ◽  
Smale Flows ◽  
Published Result

The purpose of this study is to establish the topological properties of three-dimensional manifolds which admit Morse – Smale flows without fixed points (non-singular or NMS-flows) and give examples of such manifolds that are not lens spaces. Despite the fact that it is known that any such manifold is a union of circular handles, their topology can be investigated additionally and refined in the case of a small number of orbits. For example, in the case of a flow with two non-twisted (having a tubular neighborhood homeomorphic to a solid torus) orbits, the topology of such manifolds is established exactly: any ambient manifold of an NMS-flow with two orbits is a lens space. Previously, it was believed that all prime manifolds admitting NMS-flows with at most three non-twisted orbits have the same topology. Methods. In this paper, we consider suspensions over Morse – Smale diffeomorphisms with three periodic orbits. These suspensions, in turn, are NMS-flows with three periodic trajectories. Universal coverings of the ambient manifolds of these flows and lens spaces are considered. Results. In this paper, we present a countable set of pairwise distinct simple 3-manifolds admitting NMS-flows with exactly three non-twisted orbits. Conclusion. From the results of this paper it follows that there is a countable set of pairwise distinct three-dimensional manifolds other than lens spaces, which refutes the previously published result that any simple orientable manifold admitting an NMS-flow with at most three orbits is lens space.

scholarly journals Lift in the 3-sphere of knots and links in lens spaces

2014 ◽  
Vol 23 (05) ◽  
pp. 1450022 ◽  
Author(s):  
Enrico Manfredi
Keyword(s):  
Universal Covering ◽  
Lens Spaces ◽  
Geometric Invariant ◽  
Knots And Links

An important geometric invariant of links in lens spaces is the lift in the 3-sphere of a link L in L(p, q), that is the counterimage [Formula: see text] of L under the universal covering of L(p, q). If lens spaces are defined as a lens with suitable boundary identifications, then a link in L(p, q) can be represented by a disk diagram, that is to say, a regular projection of the link on a disk. Starting from this diagram of L, we obtain a diagram of the lift [Formula: see text] in S3. Using this construction, we are able to find different knots and links in L(p, q) having equivalent lifts, that is to say, we cannot distinguish different links in lens spaces only from their lift.

THE (2, ∞)-SKEIN MODULE OF LENS SPACES: A GENERALIZATION OF THE JONES POLYNOMIAL

1993 ◽  
Vol 02 (03) ◽  
pp. 321-333 ◽  
Author(s):  
JIM HOSTE ◽  
JÓZEF H. PRZYTYCKI
Keyword(s):  
Jones Polynomial ◽  
Lens Spaces ◽  
Skein Module

We extend the Jones polynomial for links in S3 to links in L(p, q), p>0. Specifically, we show that the (2, ∞)-skein module of L(p, q) is free with [p/2]+1 generators. In the case of S1×S2 the skein module is infinitely generated.

THE (2, ∞)-SKEIN MODULE OF WHITEHEAD MANIFOLDS

1995 ◽  
Vol 04 (03) ◽  
pp. 411-427 ◽  
Author(s):  
JIM HOSTE ◽  
JÓZEF H. PRZYTYCKI
Keyword(s):  
Jones Polynomial ◽  
Skein Modules ◽  
Skein Module ◽  
Natural Filtration ◽  
Stark Contrast ◽  
Torsion Free

To any orientable 3-manifold one can associate a module, called the (2, ∞)-skein module, which is essentially a generalization of the Jones polynomial of links in S3. For an uncountable collection of open contractible 3-manifolds, each constructed in a fashion similar to the classic Whitehead manifold, we prove that their (2, ∞)-skein modules are infinitely generated, torsion free, but not free. These examples stand in stark contrast to [Formula: see text], whose (2, ∞)-skein module is free on one generator. To each of these manifolds we associate a subgroup G of the rationals which may be interpreted via wrapping numbers. We show that the skein module of M has a natural filtration by modules indexed by G. For the specific case of the Whitehead manifold, we describe its (2, ∞)-skein module and associated filtration in greater detail.

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