Results 61 to 70 of about 2,400,148 (182)
Journal of Function Spaces, 2016 We consider one-parameter null hypersurfaces associated with spacelike curves. The spacelike curves are in anti-de Sitter 3-space while one-parameter null hypersurfaces lie in 4-dimensional semi-Euclidean space with index 2.
Yongqiao Wang, Donghe Pei, Ruimei Gao
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On pseudo null and null cartan darboux helices in minkowski 3-space
Kuwait Journal of Science, 2016 In this paper, we introduce the notion of pseudo null and null Cartan Darboux helicesin Minkowski 3-space. We characterize the Darboux vectors of the pseudo null andthe null Cartan curves in terms of the Darboux helices and the rectifying curves.
Ufuk Öztürk, Emilija Nešović
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The Eclipse-mapping Null Space: Comparing Theoretical Predictions with Observed Maps
The Astronomical Journal, 2023 High-precision exoplanet eclipse light curves, like those possible with JWST, enable flux and temperature mapping of exoplanet atmospheres. These eclipse maps will have unprecedented precision, providing an opportunity to constrain current theoretical ...
Ryan C. Challener, Emily Rauscher
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Null Bertrand curves in Minkowski 3-space and their characterizations [PDF]
, 2004 We introduce the notion of Bertrand curve for Cartan framed null curves in Minkowski 3-space and give a ...
Inoguchi, Jun-ichi +2 more
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Some Characterizations of Generalized Null Scrolls
Mathematics, 2019 In this work, a family of ruled surfaces named generalized null scrolls in Minkowski 3-space are investigated via the defined structure functions. The relations between the base curve and the ruling flow of the generalized null scroll are revealed.
Jinhua Qian +2 more
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Holographic integral geometry with time dependence
Journal of High Energy Physics, 2020 We write down Crofton formulas — expressions that compute lengths of space- like curves in asymptotically AdS3 geometries as integrals over kinematic space — which apply when the curve and/or the background spacetime is time-dependent.
Bartłomiej Czech +2 more
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Mechanism of the X-ray and Soft Gamma-ray Emissions from the High Magnetic Field Pulsar: PSR B1509-58 [PDF]
Journal of Astronomy and Space Sciences, 2013 We use the outer gap model to explain the spectrum and the energy dependent light curves of the X-ray and soft γ-ray radiations of the spin-down powered pulsar PSR B1509-58.
Yu Wang, Jumpei Takata, Kwong Sang Cheng
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Pseudo-Spherical Null Quaternionic Curves in Minkowski Space R [PDF]
, 2016 In this study, we define the osculating pseudo-sphere of a null quaternionic Cartan curve in Minkowski space R 4 1 .
A Tuna Aksoy +3 more
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Null surfaces of null Cartan curves in Anti-de Sitter 3-space
The Journal of Nonlinear Sciences and Applications, 2017 Summary: In this paper, we consider the null surfaces of null Cartan curves in Anti-de Sitter 3-space and making use of singularity theory, we classify the singularities of the null surfaces and investigate the relationships between singularities of the null surfaces and differential geometric invariants of null Cartan curves in Anti-de Sitter 3-space.
Zhao, Guangyu +3 more
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Null Curve Evolution in Four-Dimensional Pseudo-Euclidean Spaces
Advances in Mathematical Physics, 2016 We define a Lie bracket on a certain set of local vector fields along a null curve in a 4-dimensional semi-Riemannian space form. This Lie bracket will be employed to study integrability properties of evolution equations for null curves in a pseudo ...
José del Amor +2 more
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