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In this work, we study plane and spherical curves in Euclidean and Lorentz-Minkowski 3-spaces by employing rotation minimizing (RM) frames. By conveniently writing the curvature and torsion for a curve on a sphere, we show how to find the…

Differential Geometry · Mathematics 2022-09-22 Luiz C. B. da Silva

Let X be a smooth projective curve over a perfect field k of positive characteristic. This work investigates the relationship between stratified cohomology and group cohomology of the stratified fundamental group of X.

Algebraic Geometry · Mathematics 2025-07-29 V. Q. Bao , P. H. Hai , D. V. Thinh

In this work, we give some new characterizations for inclined curves and slant helices in n-dimensional Euclidean space E^{n}. Morever, we consider the pre-characterizations about inclined curves and slant helices and reconfigure them.

Differential Geometry · Mathematics 2016-06-13 Ali Şenol , Evren Ziplar , Yusuf Yayli , İsmail Gök

We study plane curves of type p,q having only nodes as singularities. Every Weierstra\ss semigroup is the Weierstra\ss semigroup of such a curve at its place at infinity for properly chosen p,q. We construct plane curves of type p,q with…

Algebraic Geometry · Mathematics 2011-07-01 Helmut Knebl , Ernst Kunz , Rolf Waldi

The relation of the Weierstrass semigroup with several invariants of a curve is studied. For Galois covers of curves with group $G$ we introduce a new filtration of the group decomposition subgroup of $G$. The relation to the ramification…

Algebraic Geometry · Mathematics 2010-05-18 Sotiris Karanikolopoulos , Aristides Kontogeorgis

In the present paper, we give new Frenet formulas for the Bertrand partner curve by taking the advantage of relations between curvatures and a curve itself. Then making use of these formulas we write the differential equations and…

Differential Geometry · Mathematics 2021-03-05 Süleyman Şenyurt , Osman Çakır

In this study, we investigate a new type of a surface curve called a new D-type special curve. Also, we show that this special curve is more generally than a geodesic curve or an asymptotic curve. Then, we give the necessary and sufficient…

General Mathematics · Mathematics 2017-02-09 Zuhal Kucukarslan Yuzbasi , Munevver Yildirim Yilmaz

Here we introduce the concept of special effect curve which permits to study, from a different point of view, special linear systems in P^2, i.e. linear system with general multiple base points whose effective dimension is strictly greater…

Algebraic Geometry · Mathematics 2007-05-23 Cristiano Bocci

In this paper, we investigate a curve whose spherical image the tangent indicatrix and binormal indicatrix is slant helix and called it as a slant helix. We obtain that the spherical images are spherical slant helices defined by [3]. This…

Differential Geometry · Mathematics 2015-12-24 Beyhan Uzunoglu , Ismail Gok , Yusuf Yayli

Motivated by a problem posed by David A. Singer in 1999 and by the elastic spherical curves, we study the spherical curves whose curvature is expressed in terms of the distance to a great circle (or from a point). By introducing the notion…

Differential Geometry · Mathematics 2024-05-24 Ildefonso Castro , Ildefonso Castro-Infantes , Jesús Castro-Infantes

In this study, we give the relation of being general helix and slant helix of two curves by using the equation between them. Also we find some results and express the characterizations of these curves.

Differential Geometry · Mathematics 2013-07-11 İlkay Arslan Güven , Yusuf Yaylı

We define a new finite type invariant for stably homeomorphic class of curves on compact oriented surfaces without boundaries and extend to a regular homotopy invariant for spherical curves.

Geometric Topology · Mathematics 2008-08-28 M. Fujiwara

In this paper we define a new cohomology of a smooth manifold called Lichnerowicz type cohomology attached to a function. Firstly, we study some basic properties of this cohomology as: a de Rham type isomorphism, dependence on the function,…

Differential Geometry · Mathematics 2016-06-21 Cristian Ida

We apply contact homology to obtain new results in the problem of distinguishing immersed plane curves without dangerous self-tangencies.

Geometric Topology · Mathematics 2008-06-11 Lenhard Ng

The type of a complex projective plane curve has been recently introduced by T. Abe, P. Pokora and the first author. In the same paper they have studied the type two curves. In this paper we study plane curves of type three, with special…

Algebraic Geometry · Mathematics 2026-01-06 Alexandru Dimca , Gabriel Sticlaru

By giving an homology basis well adapted to the symmetries of Klein's curve, presented as a plane curve, we derive a new expression for its period matrix. This is explicitly related to the hyperbolic model and results of Rauch and Lewittes.

Algebraic Geometry · Mathematics 2014-11-20 H. W. Braden , T. P. Northover

We study the standard family of supercurves of genus 1 with an underlying odd spin structures. We give a simple algebraic description of this family and of the compactified family of stable supercurves with one Neveu-Schwarz puncture. We…

Algebraic Geometry · Mathematics 2024-03-06 Alexander Polishchuk

We give a complete description of all order 1 invariants of spherical curves. We also identify the subspaces of all J-invariants and S-invariants, and present two equalities satisfied by any spherical curve.

Geometric Topology · Mathematics 2007-10-11 Tahl Nowik

We formulate an isoperimetric deformation of curves on the Minkowski plane, which is governed by the defocusing mKdV equation. Two classes of exact solutions to the defocusing mKdV equation are also presented in terms of the $\tau$…

Differential Geometry · Mathematics 2019-09-04 Hyeongki Park , Jun-ichi Inoguchi , Kenji Kajiwara , Ken-ichi Maruno , Nozomu Matsuura , Yasuhiro Ohta

Salkowski \cite{salkow}, one century ago, introduced a family of curves with constant curvature but non-constant torsion (Salkowski curves) and a family of curves with constant torsion but non-constant curvature (anti-Salkowski curves) in…

Differential Geometry · Mathematics 2009-05-12 Ahmad T Ali