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We study incidences between points and algebraic curves in three dimensions, taken from a family $C$ of curves that have almost two degrees of freedom, meaning that every pair of curves intersect in $O(1)$ points, for any pair of points…

Computational Geometry · Computer Science 2020-06-24 Micha Sharir , Noam Solomon , Oleg Zlydenko

We study curve singularities in a smooth surface relative to a smooth boundary curve. We consider the semiuniversal deformations and equisingular deformations of curves with a fixed local intersection number $w$ with the boundary, and prove…

Algebraic Geometry · Mathematics 2025-10-20 Nobuyoshi Takahashi

We give necessary conditions on the invariants (d,g) of a smooth, integral curve self-linked by a complete intersection of type (a,b) in projective three space. Similar conditions are given for s.t.c.i. curves with a multiplicity three…

Algebraic Geometry · Mathematics 2013-11-05 Philippe Ellia

We study the normal map for plane projective curves, i.e., the map associating to every regular point of the curve the normal line at the point in the dual space. We first observe that the normal map is always birational and then we use…

Algebraic Geometry · Mathematics 2021-06-15 Edoardo Ballico , Alessandro Oneto

We investigate plane curves intersecting in at most two unibranched points to study the algebraic exceptional set appearing in standard conjectures of diophantine and hyperbolic geometry. Our first result compares the local geometry of two…

Algebraic Geometry · Mathematics 2025-06-23 Lucia Caporaso , Amos Turchet

In this paper, we give the definition, different types and characterizations of Mannheim partner D-curves in Minkowski 3-space. We find the relations between the geodesic curvatures, the normal curvatures and the geodesic torsions of these…

Differential Geometry · Mathematics 2010-05-07 Mustafa Kazaz , H. Hüseyin Uğurlu , Mehmet Önder , Tanju Kahraman

This study introduces a new type of general helix called associated helix which is associated to a special surface curve. The basic idea is to determinate the parametric form of an associated helix by means of Darboux frame and surface…

General Mathematics · Mathematics 2022-01-25 Mehmet Önder

In this paper, we give a simple definition of tangents to a curve in elementary geometry. From which, we characterize the existence of the tangent to a curve at a point.

History and Overview · Mathematics 2014-01-10 Duong Quoc Viet

We deal with a notion of weak binormal and weak principal normal for non-smooth curves of the Euclidean space with finite total curvature and total absolute torsion. By means of piecewise linear methods, we first introduce the analogous…

Differential Geometry · Mathematics 2020-05-19 Domenico Mucci , Alberto Saracco

In this study we consider AW(k)-type curves according to parallel transport frame in Euclidean space E^4. We give the relations between the parallel transport curvatures of these kinds of curves.

Differential Geometry · Mathematics 2016-01-18 İlim Kişi , Günay Öztürk , Sezgin Büyükkütük

Frames normal for linear connections in vector bundles are defined and studied. In particular, such frames exist at every fixed point and/or along injective path. Inertial frames for gauge fields are introduced and on this ground the…

High Energy Physics - Theory · Physics 2007-05-23 Bozhidar Z. Iliev

In this paper, we define a new family of curves and call it a {\it family of similar curves with variable transformation} or briefly {\it SA-curves}. Also we introduce some characterizations of this family and we give some theorems. This…

Differential Geometry · Mathematics 2009-09-08 Mostafa F. El-Sabbagh , Ahmad T. Ali

We give a definition of `coherent tangent bundles', which is an intrinsic formulation of wave fronts. In our application of coherent tangent bundles for wave fronts, the first fundamental forms and the third fundamental forms are considered…

Differential Geometry · Mathematics 2010-11-09 Kentaro Saji , Masaaki Umehara , Kotaro Yamada

Interpreting tangency as a limit of two transverse intersections, we obtain a concrete formula to enumerate smooth degree $d$ plane curves tangent to a given line at multiple points with arbitrary order of tangency. Extending that idea, we…

Algebraic Geometry · Mathematics 2025-02-25 Indranil Biswas , Apratim Choudhury , Ritwik Mukherjee , Anantadulal Paul

In this note we examine a natural concept of a curve on a supermanifold and the subsequent notion of the jet of a curve. We then tackle the question of geometrically defining the higher order tangent bundles of a supermanifold. Finally we…

Mathematical Physics · Physics 2014-06-04 Andrew James Bruce

In this study, we give the relationships between the conical curvatures of ruled surfaces drawn by the unit vectors of the ruling, central normal and central tangent of a regular ruled surface in the Euclidean -space. We obtain the…

Differential Geometry · Mathematics 2013-11-28 Mehmet Önder , Onur Kaya

We propose a notion of discrete elastic and area-constrained elastic curves in 2-dimensional space forms. Our definition extends the well-known discrete Euclidean curvature equation to space forms and reflects various geometric properties…

Differential Geometry · Mathematics 2025-01-24 Tim Hoffmann , Jannik Steinmeier , Gudrun Szewieczek

We first prove that, unlike the biharmonic case, there exist triharmonic curves with nonconstant curvature in a suitable Riemannian manifold of arbitrary dimension. We then give the complete classification of triharmonic curves in surfaces…

Differential Geometry · Mathematics 2021-08-06 Stefano Montaldo , Alvaro Pampano

In this article we investigate a system of geometric evolution equations describing a curvature driven motion of a family of 3D curves in the normal and binormal directions. Evolving curves may be subject of mutual interactions having both…

Analysis of PDEs · Mathematics 2022-01-11 Michal Benes , Miroslav Kolar , Daniel Sevcovic

A curve is rectifying if it lies on a moving hyperplane orthogonal to its curvature vector. In this work, we extend the main result of [Chen 2017, Tamkang J. Math. 48, 209] to any space dimension: we prove that rectifying curves are…

Differential Geometry · Mathematics 2022-09-22 Luiz C. B. da Silva , Gilson S. Ferreira