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The motivation for this work is to construct a map from classical knots to virtual ones. What we get in the paper is a series of maps from knots in the full torus (thickened torus) to flat-virtual knots. We give definition of flat-virtual…

Geometric Topology · Mathematics 2024-06-21 V. O. Manturov , I. M. Nikonov

We define a knot invariant and a 2-knot invariant from any finite categorical group. We calculate an explicit example for the Spun Trefoil.

Geometric Topology · Mathematics 2017-05-23 Joao Faria Martins

We define and study Vassiliev invariants for (long) Morse knots. It is shown that there are Vassiliev invariants which can distinguish some topologically equivalent Morse knots. In particular, there is an invariant of order 3 for Morse…

Geometric Topology · Mathematics 2007-05-23 Jacob Mostovoy , Theodore Stanford

We present the strongest known knot invariant that can be computed effectively (in polynomial time).

Geometric Topology · Mathematics 2018-12-31 Dror Bar-Natan , Roland van der Veen

We introduce new skein invariants of links based on a procedure where we first apply the skein relation only to crossings of distinct components, so as to produce collections of unlinked knots. We then evaluate the resulting knots using a…

Geometric Topology · Mathematics 2019-04-04 Louis H. Kauffman , Sofia Lambropoulou

We introduce a novel class of rotation invariants of two dimensional curves based on iterated integrals. The invariants we present are in some sense complete and we describe an algorithm to calculate them, giving explicit computations up to…

Computer Vision and Pattern Recognition · Computer Science 2013-05-30 Joscha Diehl

Knot theory is the Mathematical study of knots. In this paper we have studied the Composition of two knots. Knot theory belongs to Mathematical field of Topology, where the topological concepts such as topological spaces, homeomorphisms,…

Geometric Topology · Mathematics 2023-07-04 G Infant Gabriel , Dr N Uma

Hyperfinite knots, or limits of equivalence classes of knots induced by a knot invariant taking values in a metric space, were introduced in a previous article by the author. In this article, we present new examples of hyperfinite knots…

Geometric Topology · Mathematics 2009-11-13 Pedro Lopes

We explore a knot invariant derived from colorings of corresponding $1$-tangles with arbitrary connected quandles. When the quandle is an abelian extension of a certain type the invariant is equivalent to the quandle $2$-cocycle invariant.…

Geometric Topology · Mathematics 2016-08-09 W. Edwin Clark , Larry A. Dunning , Masahico Saito

We develop an invariant of knots that depends on a complex parameter t, describing a left ideal in the noncommutative torus. When the parameter is set equal to -1 we recover the A-polynomial of the knot. We relate the invariant to the…

Quantum Algebra · Mathematics 2007-05-23 Charles Frohman , Razvan Gelca , Walter Lofaro

We define and study a bigraded knot invariant whose Euler characteristic is the Alexander polynomial, closely connected to knot Floer homology. The invariant is the homology of a chain complex whose generators correspond to Kauffman states…

Geometric Topology · Mathematics 2018-02-06 Peter Ozsvath , Zoltan Szabo

A construction of polytopes is given based on integers. These geometries are constructed through a mapping to pure numbers and have multiple applications, including statistical mechanics and computer science. The number form is useful in…

General Physics · Physics 2007-05-23 Gordon Chalmers

We extend to the long virtual knot case the constructions first presented by A. Henrich and later generalized by the author to the framed virtual knot case. These consist of three Vassiliev invariants of order one, including a universal…

Geometric Topology · Mathematics 2016-10-12 Nicolas Petit

In this paper, we define some polynomial invariants for virtual knots and links. In the first part we use Manturov's parity axioms to obtain a new polynomial invariant of virtual knots. This invariant can be regarded as a generalization of…

Geometric Topology · Mathematics 2013-12-31 Zhiyun Cheng , Hongzhu Gao

This paper contains the strongest and at the same time most calculable knot invariant ever. Let $\Theta$ be the topological moduli space of all ordered oriented tangles in 3-space. We construct a non-trivial combinatorial 1-cocycle…

Geometric Topology · Mathematics 2025-09-30 Thomas Fiedler

Given a knot K in the 3-sphere, consider a singular disk bounded by K and the intersections of K with the interior of the disk. The absolute number of intersections, minimised over all choices of singular disk with a given algebraic number…

Geometric Topology · Mathematics 2014-11-11 Michael T. Greene , Bert Wiest

Two geometric spaces are in the same topological class if they are related by certain geometric deformations. We propose machine learning methods that automate learning of topological invariance and apply it in the context of knot theory,…

Geometric Topology · Mathematics 2025-04-18 James Halverson , Fabian Ruehle

A. Henrich proved the existence of the universal finite-type invariant of order one for virtual knots. We extend the construction and the methods of her paper to framed virtual knots. To do so, we introduce the notions of virtual strings…

Geometric Topology · Mathematics 2016-10-12 Nicolas Petit

We study the quandle counting invariant for a certain family of finite quandles with trivial orbit subquandles. We show how these invariants determine the linking number of classical two-component links up to sign.

Geometric Topology · Mathematics 2008-08-13 Natasha Harrell , Sam Nelson

We construct knot invariants from solutions to the Yang--Baxter equation associated to appropriately generalized left/right Yetter--Drinfel'd modules over a braided Hopf algebra with an automorphism. When applied to Nichols algebras, our…

Geometric Topology · Mathematics 2024-04-24 Stavros Garoufalidis , Rinat Kashaev
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