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Geometric Properties and Algorithms for Rational q-Bézier Curves and Surfaces

open access: yesMathematics, 2020
In this paper, properties and algorithms of q-Bézier curves and surfaces are analyzed. It is proven that the only q-Bézier and rational q-Bézier curves satisfying the boundary tangent property are the Bézier and rational Bézier curves, respectively ...
Jorge Delgado, J. M. Peña
doaj   +3 more sources

Birational Quadratic Planar Maps with Generalized Complex Rational Representations

open access: yesMathematics, 2023
Complex rational maps have been used to construct birational quadratic maps based on two special syzygies of degree one. Similar to complex rational curves, rational curves over generalized complex numbers have also been constructed by substituting the ...
Xuhui Wang   +4 more
doaj   +1 more source

Asymptotic Frame Fields of Rational Bézier Curves

open access: yesDüzce Üniversitesi Bilim ve Teknoloji Dergisi, 2021
Bézier curves are a type of curves used in computer aided design and related fields. The curves can be defined with the help of De Casteljau algorithm, which is one of the most basic elements of curve and surface design, and Bernstein polynomials, which ...
Tunahan Turhan   +2 more
doaj   +1 more source

Craniofacial reconstruction using rational cubic ball curves. [PDF]

open access: yesPLoS ONE, 2015
This paper proposes the reconstruction of craniofacial fracture using rational cubic Ball curve. The idea of choosing Ball curve is based on its robustness of computing efficiency over Bezier curve.
Abdul Majeed   +3 more
doaj   +1 more source

Wonderful compactifications and rational curves with cyclic action

open access: yesForum of Mathematics, Sigma, 2023
We prove that the moduli space of rational curves with cyclic action, constructed in our previous work, is realizable as a wonderful compactification of the complement of a hyperplane arrangement in a product of projective spaces.
Emily Clader   +3 more
doaj   +1 more source

Quaternion rational Bézier curves

open access: yesLietuvos Matematikos Rinkinys, 2011
We extended the rational Bézier model for space curve, by allowing quaternion weights. These curves are Möbius invariant and have halved degree with respect to real Bézier curves. This simplify the analysis of curves. In general, these curves are in four
Severinas Zube
doaj   +1 more source

Lattices and Rational Points

open access: yesMathematics, 2017
In this article, we show how to use the first and second Minkowski Theorems and some Diophantine geometry to bound explicitly the height of the points of rank N - 1 on transverse curves in E N , where E is an elliptic curve without Complex
Evelina Viada
doaj   +1 more source

Hyperkähler geometry of rational curves in twistor spaces

open access: yesComplex Manifolds, 2022
We investigate the pseudo-hyperkähler geometry of higher degree rational curves in the twistor space of a hyperkähler 4-manifold.
Bielawski Roger, Zhang Naizhen
doaj   +1 more source

Holomorphic Cartan geometries and rational curves

open access: yesComplex Manifolds, 2016
We prove that any compact Kähler manifold bearing a holomorphic Cartan geometry contains a rational curve just when the Cartan geometry is inherited from a holomorphic Cartan geometry on a lower dimensional compact Kähler manifold.
Biswas Indranil, McKay Benjamin
doaj   +1 more source

Families of Smooth Rational Curves of Small Degree on the Fano Variety of Degree 5 of Main Series

open access: yesМоделирование и анализ информационных систем, 2013
In this paper we consider some families of smooth rational curves of degree 2, 3 and 4 on a smooth Fano threefold X which is a linear section of the Grassmanian G(1, 4) under the Pl¨ucker embedding. We prove that these families are irreducible. The proof
M. S. Omelkova
doaj   +3 more sources

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