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The goal of this paper is to discuss the possibility of finding an algorithm that can give all distinct knots up to a desired complexity. Two such algorithms are presented, one based on projections on a plane, the other on closed…

q-alg · Mathematics 2008-02-03 Charilaos Aneziris

This paper presents some basic facts about the so-called connectivity spaces. In particular, it studies the generation of connectivity structures, the existence of limits and colimits in the main categories of connectivity spaces, the…

General Topology · Mathematics 2011-02-02 Stéphane Dugowson

The simple cubic lattice defines a set of points at regular distances. The volume of the Voronoi cells around each point may serve as a weight for integration over the entire space. We add interstitial points to this grid according to the…

Metric Geometry · Mathematics 2013-09-17 Richard J. Mathar

For a given poset, we consider its representations by systems of subspaces of a unitary space ordered by inclusion. We classify such systems for all posets for which an explicit classification is possible.

In this report, I will start by first giving a brief introduction on knots to build some intuition before beginning the more rigorous review in the Literature Review section. There, I will define knot equivalence, the Jones polynomial…

Geometric Topology · Mathematics 2022-02-15 Matthew Stevens

Physical knots and links are one-dimensional submanifolds of R^3 with fixed length and thickness. We show that isotopy classes in this category can differ from those of classical knot and link theory. In particular we exhibit a Gordian…

Geometric Topology · Mathematics 2016-01-20 Alexander Coward , Joel Hass

In this short note, a topos - called the topos of the connectivity space - is associated with every such space.

General Topology · Mathematics 2016-12-23 Stéphane Dugowson

A ringed finite space is a ringed space whose underlying topological space is finite. The category of ringed finite spaces contains, fully faithfully, the category of finite topological spaces and the category of affine schemes. Any ringed…

Algebraic Geometry · Mathematics 2014-10-13 Fernando Sancho de Salas

We present sufficient criteria for the equivalence of tame knots at low regularity. To this end, we introduce a localized version of Gromov's distortion for any closed path-connected subset of $\R^n$. If two such sets have local Gromov…

Geometric Topology · Mathematics 2025-12-03 Simon Blatt , Alexandra Gilsbach , Philipp Reiter , Heiko von der Mosel

Given an autohomeomorphism on an ordered topological space or its subspace, we show that it is sometimes possible to introduce a new topology-compatible order on that space so that the same map is monotonic with respect to the new ordering.…

General Topology · Mathematics 2023-06-27 Raushan Buzyakova

Weak similarities form a special class of mappings between semimetric spaces. Two semimetric spaces $X$ and $Y$ are weakly similar if there exists a weak similarity $\Phi\colon X\to Y$. We find a structural characteristic of finite…

General Topology · Mathematics 2024-12-31 Evgeniy Petrov

Knots naturally appear in continuous dynamical systems as flow periodic trajectories. However, discrete dynamical systems are also closely connected with the theory of knots and links. For example, for Pixton diffeomorphisms, the…

Dynamical Systems · Mathematics 2023-03-09 Valeriy Bardakov , Tatyana Kozlovskaya , Olga Pochinka

We give a direct proof that middle mapping spaces in coherent nerves of Kan enriched categories have the same homotopy type as the original mapping spaces.

Algebraic Topology · Mathematics 2020-11-19 Fabian Hebestreit , Achim Krause

A subunit in a monoidal category is a subobject of the monoidal unit for which a canonical morphism is invertible. They correspond to open subsets of a base topological space in categories such as those of sheaves or Hilbert modules. We…

Category Theory · Mathematics 2020-06-22 Pau Enrique Moliner , Chris Heunen , Sean Tull

Given based cellular spaces X and Y, X compact, we define a sequence of increasingly fine equivalences on the based-homotopy set [X,Y].

Algebraic Topology · Mathematics 2024-06-05 S. S. Podkorytov

Let (X,dX) and (Y,dY) be semimetric spaces with distance sets D(X) and, respectively, D(Y). A mapping F : X \to Y is a weak similarity if it is surjective and there exists a strictly increasing f : D(Y) \to D(X) such that dX = f \circ dY…

Metric Geometry · Mathematics 2012-09-11 Oleksiy Dovgoshey , Evgeniy Petrov

This paper defines an invariant associated to Whitehead's certain exact sequence of a simply connected CW-complex which is much more elementary - and less powerful - than the boundary invariant of Baues. Nevertheless, in good cases, it…

Algebraic Topology · Mathematics 2018-04-24 Mahmoud Benkhalifa

We show that the space of long knots in an euclidean space of dimension larger than three is a double loop space, proving a conjecture by Sinha. We construct also a double loop space structure on framed long knots, and show that the map…

Algebraic Topology · Mathematics 2007-05-23 Paolo Salvatore

We provide the expected constructions of weakly $\omega$-categorified models (in the sense of Bressie) of the theory of groups and quandles which arise by replacing the homotopies used to give equivalence relations in the theory of…

Category Theory · Mathematics 2020-06-30 Phillip M Bressie , David N Yetter

We introduce the notion of a weak (homotopy) moment map associated to a Lie group action on a multisymplectic manifold. We show that the existence/uniqueness theory governing these maps is a direct generalization from symplectic geometry.…

Symplectic Geometry · Mathematics 2018-07-05 Jonathan Herman