Results 41 to 50 of about 195 (125)
Ricci and scalar curvatures of submanifolds of a conformal Sasakian space form [PDF]
, 2016 summary:We introduce a conformal Sasakian manifold and we find the inequality involving Ricci curvature and the squared mean curvature for semi-invariant, almost semi-invariant, $\theta $-slant, invariant and anti-invariant submanifolds tangent to the ...
Abedi, Esmaeil +2 more
core +1 more source
On the Electromagnetic Energy Flow Along Geodesics
Radio Science, Volume 61, Issue 1, January 2026.Abstract We present a field‐theoretic framework for modeling electromagnetic energy propagation in heterogeneous media by introducing the concept of electromagnetic geodesics. Unlike traditional ray optics, which assumes either a straight‐line propagation or a simple bending in refractive media, our approach formulates wave propagation as geodetic ...
Jacob T. Fokkema, Peter M. van den Berg
wiley +1 more source
Vector‐Based and Machine Learning Approaches for Pore Network Parameters Analysis
Geophysical Prospecting, Volume 74, Issue 1, January 2026.ABSTRACT Accurate characterization of pore structures in carbonate rocks is critical for evaluating fluid flow and storage capacity in subsurface reservoirs, a key concern in geophysical exploration and reservoir engineering. This study proposes a hybrid digital rock physics workflow that integrates deep learning–based segmentation, vectorial geometric
José Frank V. Gonçalves +4 more
wiley +1 more source
Some Symmetry Properties of Almost S-Manifolds [PDF]
, 2017 Manifold theory is an important topic in differential geometry. Riemannian manifolds are a wide class of differentiable manifolds. Riemannian manifolds consist of two fundamental class, as contact manifolds and complex manifolds.
Sarıkaya, Mehmet Zeki +1 more
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Siegel–Veech constants for cyclic covers of generic translation surfaces
Journal of the London Mathematical Society, Volume 113, Issue 1, January 2026.Abstract We compute the asymptotic number of cylinders, weighted by their area to any nonnegative power, on any cyclic branched cover of any generic translation surface in any stratum. Our formulae depend only on topological invariants of the cover and number‐theoretic properties of the degree: in particular, the ratio of the related Siegel–Veech ...
David Aulicino +4 more
wiley +1 more source
Hermitian Tanno Connection and Bochner Type Curvature Tensors of Contact Riemannian Manifolds [PDF]
, 2018 On a contact Riemannian manifold, considering the curvature of hermitian Tanno connection, we introduce Bochner type curvature tensors. Some of them are pseudo-conformally invariant under gauge transformation and so are the others if and only if the ...
Sasaki Daisuke, Nagase Masayoshi
core
Slant and pseudo-slant submanifolds in ${\rm LCS}$-manifolds [PDF]
, 2013 summary:We show new results on when a pseudo-slant submanifold is a LCS-manifold. Necessary and sufficient conditions for a submanifold to be pseudo-slant are given.
Kumar Hui, Shyamal, Atçeken, Mehmet
core +1 more source
International Journal of Intelligent Systems, Volume 2026, Issue 1, 2026.Depression is a serious mental disorder, and timely detection and treatment are crucial. Electroencephalography (EEG), as a noninvasive tool directly reflecting brain activity, is suitable for objective depression detection. However, due to difficulty in acquiring depression EEG data, public datasets suffer from limited sample sizes and insufficient ...
Huang Huang +6 more
wiley +1 more source
ALMOST CONTACT METRIC STRUCTURES IN HYPERSURFACES OF B-SPACES OF ELLIPTIC. [PDF]
, 2010 An almost contact metric structure (φ, ξ, η, g) of the elliptic type and of the second kind is defined in (2n-1)-dimensional manifold M2n-1 by affinor , vector , covector and metric gij satisfying the conditions: , , , .
Kravčenkaitė, Deimantė,
core
$\eta $-Ricci Solitons on $\eta $-Einstein $(LCS)_n$-Manifolds [PDF]
, 2016 summary:The object of the present paper is to study $\eta $-Ricci solitons on $\eta $-Einstein $(LCS)_n$-manifolds. It is shown that if $\xi $ is a recurrent torse forming $\eta $-Ricci soliton on an $\eta $-Einstein $(LCS)_n$-manifold then $\xi $ is (i)
Hui, Shyamal Kumar +1 more
core +1 more source