Results 51 to 60 of about 20,711 (219)
Semi-Riemannian submersions from real and complex pseudo-hyperbolic spaces
, 2002 We classify the semi-Riemannian submersions from a pseudo-hyperbolic space onto a Riemannian manifold under the assumption that the fibres are connected and totally geodesic.
Bădiţoiu, Gabriel +3 more
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Dual selections based knowledge transfer learning for cross-subject motor imagery EEG classification
Frontiers in Neuroscience, 2023 IntroductionMotor imagery electroencephalograph (MI-EEG) has attracted great attention in constructing non-invasive brain-computer interfaces (BCIs) due to its low-cost and convenience. However, only a few MI-EEG classification methods have been recently
Tian-jian Luo, Tian-jian Luo
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Pseudo-Riemannian symmetric R-spaces
Osaka Journal of Mathematics, 1984 The author [Nagoya Math. J. 90, 85-117 (1983; Zbl 0509.53046) and 91, 119-149 (1983; Zbl 0514.53047)] has defined ''orthogonal Jordan triple systems'' and has constructed ''pseudo-Riemannian symmetric R-spaces'' from orthogonal Jordan triple systems with a certain condition. They are extensions of compact Jordan triple system and Riemannian symmetric R-
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The Lp$L^p$‐diameter of the space of contractible loops
Bulletin of the London Mathematical Society, Volume 58, Issue 5, May 2026.Abstract We prove that the space of contractible simple loops of a given fixed area in any compact oriented surface has infinite diameter as a homogeneous space of the group of area‐preserving diffeomorphisms endowed with the Lp$L^p$‐metric. As a special case, this resolves the Lp$L^p$‐metric analog of the well‐known question in symplectic topology ...
Michael Brandenbursky, Egor Shelukhin
wiley +1 more source
Riemannian submersions From Almost Hermitian Manifolds
, 2017 In this chapter, we introduce various new Riemannian submersions from almost Hermitian manifolds on to Riemannian manifolds. In section 1, we first review almost Hermitian manifolds and their submanifolds, and give brief information about holomorphic ...
Sahin, Bayram, Bayram Şahin
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Semisimple weakly symmetric pseudo-Riemannian manifolds [PDF]
, 2018 We develop the classification of weakly symmetric pseudo-Riemannian manifolds G / H where G is a semisimple Lie group and H is a reductive subgroup.
Chen, Zhiqi, Wolf, Joseph A
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The action of pseudo-differential operators on functions harmonic outside a smooth hyper-surface
Comptes Rendus. MathématiqueThe goal of this note is to describe the action of pseudo-differential operators on the space of square integrable functions which are harmonic outside a smooth closed hyper-surface of a compact Riemannian manifold.
Boutet de Monvel, Louis +1 more
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Strolling along gravitational vacua
Journal of High Energy Physics, 2020 We consider General Relativity (GR) on a space-time whose spatial slices are compact manifolds M with non-empty boundary ∂M. We argue that this theory has a non-trivial space of ‘vacua’, consisting of spatial metrics obtained by an action on a reference ...
Emine Şeyma Kutluk +2 more
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On projective group properties of the 6D pseudo-Riemannian space [PDF]
Czechoslovak Journal of Physics, 2005 4 pages, talk presented at the "Integrable Systems-2005", Prague ...
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Red Blood Cell Membrane Mechanics Using Discrete Exterior Calculus (DEC) and Optimization
International Journal for Numerical Methods in Biomedical Engineering, Volume 42, Issue 4, April 2026.We present a novel DEC approach for calculating RBC shapes applicable to other cell types and membrane problems. We derive an energy minimization equation that can be solved semi‐implicitly, and a Lie derivative method to control node spacing. This novel work should aid computational modeling in many biological situations.
Keith C. Afas, Daniel Goldman
wiley +1 more source