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We show that a transverse link in a contact structure supported by an open book decomposition can be transversely braided. We also generalize Markov's theorem on when the closures of two braids represent (transversely) isotopic links.

Geometric Topology · Mathematics 2015-03-13 Elena Pavelescu

The classical Thistlethwaite theorem for links can be phrased as asserting that the Kauffman bracket of a link can be obtained from an evaluation of the Bollob\'as-Riordan polynomial of a ribbon graph associated to one of the link's…

Geometric Topology · Mathematics 2024-12-18 Sergei Chmutov , Qingying Deng , Joanna A. Ellis-Monaghan , Sergei Lando , Wout Moltmaker

In [Jo14] and [Jo18] Vaughan Jones introduced a construction which yields oriented knots and links from elements of the oriented Thompson group $\vec{F}$. In this paper we prove, by analogy with Alexander's classical theorem establishing…

Geometric Topology · Mathematics 2020-03-11 Valeriano Aiello

We prove that every unconditionally closed subset of a free group is algebraic, thereby answering affirmatively a 76 years old problem of Markov for free groups. In modern terminology, this means that Markov and Zariski topologies coincide…

Group Theory · Mathematics 2022-10-18 Dmitri Shakhmatov , Víctor Hugo Yañez

In the first part of this paper we present a theory of proof nets for full multiplicative linear logic, including the two units. It naturally extends the well-known theory of unit-free multiplicative proof nets. A linking is no longer a set…

Logic in Computer Science · Computer Science 2017-01-11 Francois Lamarche , Lutz Strassburger

In this paper we prove the theorem on freedom for relatively free groups with a single relation (analogous with the well-known result of Magnus) and the theorem on freedom for relatively free Lie algebras with a single relation (analogous…

Group Theory · Mathematics 2021-07-27 Alexander Krasnikov

Study of certain isotopy classes of a finite collection of immersed circles without triple or higher intersections on closed oriented surfaces can be thought of as a planar analogue of virtual knot theory where the genus zero case…

Geometric Topology · Mathematics 2021-07-19 Neha Nanda , Mahender Singh

We prove some necessary conditions for a link to be either concordant to a quasi-positive link, quasi-positive, positive, or the closure of a positive braid. The main applications of our results are a characterisation of positive links with…

Geometric Topology · Mathematics 2023-11-14 Carlo Collari

Minimum braids are a complete invariant of knots and links. This paper defines minimum braids, describes how they can be generated, presents tables for knots up to ten crossings and oriented links up to nine crossings, and uses minimum…

Geometric Topology · Mathematics 2007-05-23 Thomas A. Gittings

Algorithm of construction of all knots, links with given number of crosses on diagram of knot, link is offered. This algorithm is based on simple proposition, that there is a representation of knot (link) as closure of braid with n threads…

Geometric Topology · Mathematics 2007-05-23 S. S. Serova , S. A. Serov

Finite type invariants (also known as Vassiliev invariants) of pure braids are considered from a group-theoretic point of view. New results include a construction of a universal invariant with integer coefficients based on the Magnus…

Geometric Topology · Mathematics 2007-05-23 Jacob Mostovoy , Simon Willerton

The notion of Vassiliev algebra in case of hanlebodies is developed. The analogues of the results of John Baez for links in handlebodies are proved. That means that there exists a one-to-one correspondence between the special class of…

q-alg · Mathematics 2012-02-22 V. V. Vershinin

The L-move for classical braids extends naturally to trivalent braids. We follow the L-move approach to the Markov Theorem, to prove a one-move Markov-type theorem for trivalent braids. We also reformulate this L-Move Markov theorem and…

Geometric Topology · Mathematics 2020-02-05 Carmen Caprau , Gabriel Coloma , Marguerite Davis

Residual torsion-free nilpotence has proven to be an important property for knot groups with applications to bi-orderability and ribbon concordance. Mayland proposed a strategy to show that a two-bridge knot group has a commutator subgroup…

Geometric Topology · Mathematics 2021-07-12 Jonathan Johnson

In this paper, we introduce twisted virtual doodles, defined as stable equivalence classes of immersed circles on closed surfaces that may be non-orientable. These objects admit planar representative diagrams, considered up to a suitable…

Geometric Topology · Mathematics 2025-11-13 Komal Negi , Mahender Singh

We view the $\tilde{A}$-type affine braid group as a subgroup of the $B$-type braid group. We show that the $\tilde{A}$-type affine braid group surjects onto the $A$-type braid group and we detect the kernel of this surjection using…

Group Theory · Mathematics 2015-02-03 Sadek Al Harbat

In this paper we will present the results of Artin--Markov on braid groups by using the Groebner--Shirshov basis. As a consequence we can reobtain the normal form of Artin--Markov--Ivanovsky as an easy corollary.

Group Theory · Mathematics 2008-06-09 L. A. Bokut , V. V. Chaynikov , K. P. Shum

Let $B_n$ denote the classical braid group on $n$ strands and let the {\em mixed braid group} $B_{m,n}$ be the subgroup of $B_{m+n}$ comprising braids for which the first $m$ strands form the identity braid. Let…

Geometric Topology · Mathematics 2007-05-23 Sofia Lambropoulou , Colin P. Rourke

In this paper we look at which Alexander and Markov theories can be defined for generalized knot theories

Geometric Topology · Mathematics 2019-02-13 Andrew Bartholomew , Roger Fenn

Alexander group systems for virtual long knots are defined and used to show that any virtual knot is the closure of infinitely many long virtual knots. Manturov's result that there exists a pair of long virtual knots that do not commute is…

Geometric Topology · Mathematics 2007-05-23 Daniel S. Silver , Susan G. Williams