Results 121 to 130 of about 409,873 (273)

On Randers metrics of reversible projective Ricci curvature

پژوهش‌های ریاضی, 2017
projective Ricci curvature. Then we characterize isotropic projective Ricci curvature of Randers metrics. we also show that Randers metrics are PRic-reversible if and only if they are PRic-quadratic../files/site1/files/0Abstract2 ...
Bahman Rezaei, Somayeh Esmaeilpour, Mehran Gabrani   +2 more
doaj  

Certain results on tangent bundle endowed with generalized Tanaka Webster connection (GTWC) on Kenmotsu manifolds

AIMS Mathematics
This work studies the complete lifts of Kenmotsu manifolds associated with the generalized Tanaka-Webster connection (GTWC) in the tangent bundle.
Rajesh Kumar , Sameh Shenawy , Lalnunenga Colney, Nasser Bin Turki   +3 more
doaj   +1 more source

η-Ricci Solitons on Sasakian 3-Manifolds

Annals of the West University of Timisoara: Mathematics and Computer Science, 2017
In this paper we study η-Ricci solitons on Sasakian 3-manifolds. Among others we prove that an η-Ricci soliton on a Sasakian 3-manifold is an η-Einstien manifold.
Majhi Pradip, De Uday Chand, Kar Debabrata   +2 more
doaj   +1 more source

Characterization of Bioactive Compounds and Evaluation of Antimicrobial Activity of Humulus lupulus (L.) cv. Cascade Leaves Throughout the Growing Season

Journal of Sustainable Agriculture and Environment, Volume 4, Issue 3, September 2025.
ABSTRACT Hop (Humulus lupulus L.) is recognised for its abundance of bioactive compounds, which make it a valuable natural resource. While much of the research has focused on the cones, hop leaves remain relatively unexplored, particularly in terms of changes occurring throughout the plant's growing cycle.
Leandra Leto, Claudia Favari, Annalisa Ricci, Lorenzo Del Vecchio, Andrea Di Fazio, Anna Agosti, Margherita Rodolfi, Letizia Bresciani, Pedro Mena, Valeria Guarrasi, Valentina Bernini, Martina Cirlini, Tommaso Ganino, Benedetta Chiancone   +13 more
wiley   +1 more source

Augmentations of Forman’s Ricci curvature and their applications in community detection

Journal of Physics: Complexity
The notion of curvature on graphs has recently gained traction in the networks community, with the Ollivier–Ricci curvature (ORC) in particular being used for several tasks in network analysis, such as community detection.
Lukas Fesser, Sergio Serrano de Haro Iváñez, Karel Devriendt, Melanie Weber, Renaud Lambiotte   +4 more
doaj   +1 more source

Combining 3‐D Deep Electrical Resistivity Tomography With Magnetic Surveys to Investigate Complex Tectonic Basins: A Case Study From the Central Apennines Seismic Belt (Italy)

Tectonics, Volume 44, Issue 9, September 2025.
Abstract We use an innovative geophysical approach to reconstruct the deep structure of Campo Felice, an important extensional basin in the central Apennines (Italy) where active crustal extension is accommodated by normal faults capable of generating earthquakes of magnitude MW 6+.
V. Sapia, F. Villani, L. Improta, F. Fischanger, P. M. De Martini, V. Romano, V. Materni, P. Baccheschi, A. Smedile, I. Nicolosi, L. Minelli, F. D’Ajello Caracciolo, R. Carluccio, S. Maraio, G. Di Giulio, L. Ruggiero, A. Sciarra, D. Pantosti, M. Pischiutta, T. Ricci, R. Civico, M. Vassallo, C. A. Brunori, M. Lupi   +23 more
wiley   +1 more source

On the equivalence of two curvature conditions for Lorentzian hypersurfaces

Arab Journal of Mathematical Sciences, 2017
Let n≥3. We show that semi-symmetry and Ricci-semisymmetry conditions are equivalent for any n-dimensional Lorentzian hypersurface in a Lorentzian space form with nonzero curvature.
Mohammed Guediri, Norah Alshehri
doaj   +1 more source

On a conformally flat Riemannian space with positive Ricci curvature [PDF]

, 1967
Mariko Tani
openalex   +1 more source

On the Ricci curvature of steady gradient Ricci solitons

Journal of Mathematical Analysis and Applications, 2010
AbstractAssume (Mn,g) is a complete steady gradient Ricci soliton with positive Ricci curvature. If the scalar curvature approaches 0 towards infinity, we prove that ∫0+∞Rc(γ˙(s),γ˙(s))ds=R(O), where O is the point where R obtains its maximum and γ(s) is a minimal normal geodesic emanating from O.
openaire   +2 more sources

Learning loads on in‐service underground infrastructure with a trans‐dimensional Bayesian inversion method

Computer-Aided Civil and Infrastructure Engineering, Volume 40, Issue 23, Page 3750-3772, 19 September 2025.
Abstract Monitoring external loads on underground structures is crucial for structural health assessment. Inverting earth pressures from observable structural responses, such as deformation data, holds promise. However, existing methods often rely on presumptions about pressure complexity, which can be infeasible for many poorly performing in‐service ...
Zhiyao Tian, Xianfei Yin, Shunhua Zhou
wiley   +1 more source