Results 1 to 10 of about 1,107,821 (189)
Journal of Mathematical Analysis and Applications, 2013 Abstract We consider the one-parameter families of Gauss indicatrices on Lorentzian hypersurfaces in pseudo-spheres in semi-Euclidean 4-space with index 2 and give the types of singularities of the Lorentzian hypersurfaces by the contact theory.
Donghe Pei
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AIMS MathematicsIn this paper, we presented the geometrical properties of Smarandache curves on 3-pseudo-spheres. These curves were examined in the context of the lightcone, de Sitter space, and anti-de Sitter space. By leveraging the curvature relationships between the
Huina Zhang, Yanping Zhao, Jianguo Sun
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The general Racah algebra as the symmetry algebra of generic systems on pseudo-spheres [PDF]
Journal of Physics A: Mathematical and Theoretical, 2020 We characterize the symmetry algebra of the generic superintegrable system on a pseudo-sphere corresponding to the homogeneous space SO(p, q + 1)/SO(p, q) where p+q=N, N∈N. These symmetries occur both in quantum as well as in classical systems in various
Ş. Kuru, I. Marquette, J. Negro
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On the twistor space of pseudo-spheres☆ [PDF]
Differential Geometry and its Applications, 2005 We give a proof that the sphere S 6 does not admit an integrable orthogonal complex structure using simple differential geometric methods. This appears as a corollary of a general analogous result concerning pseudo-spheres.
R. Albuquerque, Isabel M. C. Salavessa
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Spacelike parallels and evolutes in Minkowski pseudo-spheres
Journal of Geometry and Physics, 2007 The authors describe some results of the project constructing the extrinsic dif\-fe\-ren\-ti\-al geometry on submanifolds of Minkowski pseudo-spheres (hyperbolic space, de Sitter space and the lightcone). The authors review classification results on totally umbilic space-like hypersurfaces in pseudo-spheres.
Masatomo Takahashi, Shyuichi Izumiya
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The mandala of Legendrian dualities for pseudo-spheres in Lorentz-Minkowski space and "flat" spacelike surfaces [PDF]
Journal of Singularities, 2009 Using the Legnedrian duarities between surfaces in pseudo-spheres in Lorentz-{Minkow}{ski} 4-space, we study various kind of flat surfaces in pseudo-spheres. We consider a surface in the pseudo-sphere and its dual surface. Flatness of a surface is defined by the degeneracy of the dual surface similar to the case for the Gauss map of a flat ...
S. Izumiya, K. Saji
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Extensions of the mandala of Legendrian dualities for pseudo-spheres in Lorentz–Minkowski space
Topology and Its Applications, 2012 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Handan Yildirim, Shyuichi Izumiya
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A mandala of Legendrian dualities for pseudo-spheres in semi-Euclidean space
Proceedings of the Japan Academy Series A: Mathematical Sciences, 2009 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Liang Chen, Shyuichi Izumiya
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Enhancement of signal-to-noise ratio at a high-order exceptional point of coherent perfect absorption [PDF]
Nature CommunicationsExceptional points (EPs) in non-Hermitian systems offer a remarkably strong response to weak perturbations, but the nonorthogonal nature of the corresponding eigenvectors causes noise to diverge, hindering EPs practical application.
Zi-Qi Wang +6 more
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Iridium Oxide Shell Structure on Rutile Titanium Oxide for Efficient Supported Catalyst for the Oxygen Evolution Reaction [PDF]
Advanced ScienceProton exchange membrane water electrolysis is a promising technology for the production of hydrogen via water electrolysis. Lower amounts of iridium oxide are needed at the anode to reduce the cost and precious metal dependence of this technology for ...
Elena Cazzulani +7 more
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