Results 1 to 10 of about 2,566 (295)
, 2017 Este trabalho trata das seções cônicas (circunferência, elipse, hipérbole e parábola), curvas planas obtidas pela intersecção de um cone circular reto com um plano. O objetivo do trabalho é representar algebricamente essas figuras geométricas.
Ovidiu Furdui, Furdui Ovidiu
exaly +3 more sources
Tohoku Mathematical Journal, 2021 We classify the configurations of lines and conics in smooth Kummer quartics, assuming that all $16$ Kummer divisors map to conics. We show that the number of conics on such a quartic is at most $800$
Degtyarev, Alex
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Ferroelectric nematic liquids with conics [PDF]
Nature Communications, 2023 Defect lines shaped as conic sections are common in smectic liquid crystals, where they manifest equidistance of molecular layers curled in space. Here authors present hyperbolas and parabolas as domain walls in ferroelectric nematics, which are shaped ...
Priyanka Kumari +3 more
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A Geometric Theory Integrating Human Binocular Vision With Eye Movement [PDF]
Frontiers in Neuroscience, 2020 A theory of the binocular system with asymmetric eyes (AEs) is developed in the framework of bicentric perspective projections. The AE accounts for the eyeball's global asymmetry produced by the foveal displacement from the posterior pole, the main ...
Jacek Turski
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Conics With Double Points and Tritangent Conics in Cubic Structure
Journal of MathematicsIn this paper, we introduce the concept of a conic with double point in a cubic structure. We define and study tritangent conics in a cubic structure, especially considering tritangent conics in a cubic structure of rank 2.
Vladimir Volenec +2 more
exaly +2 more sources
, 2023 Konike ili čunjosječnice su algebarske ravninske krivulje drugoga reda nastale presjekom ravnine i stožaste plohe. To su kružnica, elipsa, parabola i hiperbola, te njihove degeneracije, koje u ovom radu općenito nismo uzimali u obzir.
Smolić, Iva
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On the Number of Ordinary Conics
SIAM Journal on Discrete Mathematics, 2016 We prove a lower bound on the number of ordinary conics determined by a finite point set in $\mathbb{R}^2$. An ordinary conic for a subset $S$ of $\mathbb{R}^2$ is a conic that is determined by five points of $S$, and contains no other points of $S$.
Frank De Zeeuw
exaly +3 more sources
Orthoptic Sets and Quadric Hypersurfaces
Communications in Advanced Mathematical Sciences, 2021 Orthoptic curves for the conics are well known. It is the Monge's circle for ellipse and hyperbola, and for parabola it is its directrix. These conics are level sets of quadratic functions in the plane. We consider level sets of quadratic functions in
François Dubeau
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Relationship between low-frequency electric-field fluctuations and ion conics around the cusp/cleft region [PDF]
Annales Geophysicae, 2006 We investigated the relationship between low-frequency (0.2-4.0 Hz) electric-field fluctuations (LEFs) and ion conics around the dayside cusp/cleft region in the altitude range from 5000 to 10000km from observations made by the Akebono satellite.
W. Miyake, A. Matsuoka, T. Mukai
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A Novel Necessary and Sufficient Condition for the Positivity of a Binary Quartic Form
Journal of Mathematics, 2021 In this paper, by considering the common points of two conics instead of the roots of the binary quartic form, we propose a novel necessary and sufficient condition for the positivity of a binary quartic form using the theory of the pencil of conics ...
Yang Guo
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