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A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

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48 results for linked curves

This paper investigates the equivalence between Yamada polynomial and Jones polynomial of associated links for brunnian θ-curves.

problem Understanding the relationship between Yamada polynomial and Jones polynomial for θ-curves.
method Investigates the equivalence between the normalized Yamada polynomial of θ-curves and the Jones polynomial of their associated links.
result Shows that the two polynomials are equivalent for brunnian θ-curves.

We introduce the self-linking number of a smooth closed curve in R^n with respect to a 3-dimensional vector bundle over the curve, provided that some regularity conditions are satisfied. When n=3, this construction gives the classical self-linking number of a closed embedded curve with non-vanishing curvature. We also …

1999-06-02abs ↗pdf ↗

Study on closed curves on negatively curved surfaces, linking number formula, and restrictions.

problem Isometric rigidity of tight surfaces and properties of closed asymptotic curves.
method Using Călugăreanu's theorem, derive a formula for the linking number and analyze properties of curves.
result Closed curves with zero linking number cannot have certain planar projections.

In this paper we study a model of random knots obtained by fixing a space curve in nn-dimensional Euclidean space with n>3n>3, and orthogonally projecting the space curve on to random 33 dimensional subspaces. By varying the space curve we obtain different models of random parametrized knots, and we will study how the…

2016-02-03abs ↗pdf ↗

We study the generalization of quasipositive links from the three-sphere to arbitrary closed, orientable three-manifolds. Our main result shows that the boundary of any smooth, properly embedded complex curve in a Stein domain is a quasipositive link. This generalizes a result due to Boileau and Orevkov, and it provide…

2017-03-29abs ↗pdf ↗

Recently N.A'Campo suggested a construction of a link from a generic immersion of a curve into a 2-disk. It is tightly related to the singularity theory. In this paper, we give a simple procedure to draw a diagram of the link from a picture of the curve.

2002-05-31abs ↗pdf ↗

The primary objects of study in the ``knot theory of complex plane curves'' are C-links: links (or knots) cut out of a 3-sphere in the complex plane by complex plane transverse and totally tangential. Transverse C-links are naturally oriented. There are many natural classes of examples: links of singularities; links at…

2004-11-05abs ↗pdf ↗

Study dd-invariants of L-space double branched covers of arborescent links.

problem Determine dd-invariants of double branched covers of arborescent links.
method Use immersed curves description of bordered Floer homology and involution of curves.
result Spin dd-invariants of Σ2(L)Σ_2(L) are determined by the signatures of LL.

We apply the methods of Heegaard Floer homology to identify topological properties of complex curves in the complex projective plane. As one application, we resolve an open conjecture that constrains the Alexander polynomial of the link of the singular point of the curve in the case that there is exactly one singular p…

2013-04-03abs ↗pdf ↗

Study on links formed by pseudocircle arrangements, focusing on three unavoidable cases.

problem Counting non-equivalent positive oriented links with pseudocircle arrangements as shadows.
method Analyzing three unavoidable arrangements of pseudocircles to estimate the number of non-equivalent links.
result Sharp estimates on the number of non-equivalent positive oriented links for the three unavoidable arrangements.

A few years ago N.A'Campo invented a construction of a link from a real curve immersed into a disk. In the case of the curve originating from the real morsification method the link is isotopic to the link of the corresponding singularity. There are some curves which do not occur in the singularity theory. In this artic…

2002-07-25abs ↗pdf ↗

We use Morse theoretical arguments to study algebraic curves in C^2. We take an algebraic curve C in C^2 and intersect it with a family of spheres with fixed origin and varying radii. We explain in detail how does the resulting link change when we cross a singular point of C. Applying link invariants as Murasugi's sign…

2011-01-10abs ↗pdf ↗

Essential surfaces in link diagrams on surfaces are crucial for understanding link properties.

problem Understanding the essentiality of surfaces in link diagrams on surfaces.
method Proving checkerboard surfaces are π1-essential and contain no essential closed curves that are ∂-parallel.
result Checkerboard surfaces of alternating link diagrams are π1-essential and contain no essential closed curves that are ∂-parallel.

We provide a proof and analyze the asymptotic behavior of a formula for the linking number of line segments.

problem The invariant formula for the linking number of line segments and its asymptotic behavior.
method Detailed proof and asymptotic analysis of the formula.
result We provide a proof and analyze the asymptotic behavior of the formula for the linking number of line segments.

An axis of a link projection is a closed curve which lies symmetrically on each region of the link projection. In this paper we define axis systems of link projections and characterize axis systems of the standard projections of twist knots.

2016-12-11abs ↗pdf ↗

The study finds non-simple isotopy classes of links in 3-manifolds, including Legendrian and pseudo-Legendrian examples.

problem Characterizing isotopy classes of links in 3-manifolds, especially in contact structures.
method Developed theory of links transverse to a nowhere-zero vector field, constructing examples in both Legendrian and pseudo-Legendrian settings.
result Non-simple isotopy classes of links exist, including Legendrian and pseudo-Legendrian examples.

Worldsheet skein D-module for Hopf link conormal uniquely determines partition functions.

problem Understanding HOMFLYPT polynomials and their geometric origins.
method Defining worldsheet skein module and D-module, considering skein valued open curve counts.
result Worldsheet skein D-module for Hopf link conormal is generated by three operator polynomials.

We construct cobordism maps on link Floer homology associated to decorated link cobordisms. The maps are defined on a curved chain homotopy type invariant. We describe the construction, and prove invariance. We also make a comparison with the graph TQFT for Heegaard Floer homology.

2016-10-17abs ↗pdf ↗

Inspired by the paper on quantum knots and knot mosaics [23] and grid diagrams (or arc presentations), used extensively in the computations of Heegaard-Floer knot homology [2,3,7,24], we construct the more concise representation of knot mosaics and grid diagrams via mirror-curves. Tame knot theory is equivalent to knot…

2011-06-19abs ↗pdf ↗

Knots and links are interpreted as homotopy classes of nanowords and nanophrases in an alphabet consisting of 4 letters. Similar results hold for curves on surfaces. We also discuss versions of the Jones link polynomial and the link quandles for nanophrases.

2005-06-20abs ↗pdf ↗

The construction of integer linking numbers of closed curves in a three-dimensional manifold usually appeals to the orientation of this manifold. We discuss how to avoid it constructing similar homotopy invariants of links in non-orientable manifolds.

2016-06-19abs ↗pdf ↗

Steinhaus conjectured that every closed oriented C1C^1-curve has a pair of anti-parallel tangents. Porter disproved the conjecture by showing that there exist curves with no anti-parallel tangents. Colin Adams rised the question of whether there exists a nontrivial knot in R3\R^3 which has no parallel or antiparallel t…

1999-12-06abs ↗pdf ↗

For every link LL we construct a complex algebraic plane curve that intersects S3S^3 transversally in a link L~\tilde{L} that contains LL as a sublink. This construction proves that every link LL is the sublink of a quasipositive link that is a satellite of the Hopf link. The explicit construction of the complex pla…

2019-07-24abs ↗pdf ↗

The n-th hull of a union of curves in R^3 is the set of points with the property: Any plane passing through the point intersects the curves at least 2n times. The hull number u(L) of a link L is defined as the minimum number of non-empty hulls a representative of L can have. We show that the hull numbers of torus links…

2004-12-07abs ↗pdf ↗

Walter Neumann showed that the topology of a ``regular'' algebraic curve V in C^2 is determined up to proper isotopy by some link in S^3 called the link at infinity of V. In this note, we compute the Alexander module over C[t^{\pm 1}] of any such link at infinity.

2004-06-08abs ↗pdf ↗