Results 81 to 90 of about 283,922 (217)
Ricci flow on a 3-manifold with positive scalar curvature [PDF]
, 2009 In this paper we consider Hamilton's Ricci flow on a 3-manifold with a metric of positive scalar curvature. We establish several a priori estimates for the Ricci flow which we believe are important in understanding possible singularities of the Ricci ...
Qian, Zhongmin, Qian, Z
core +1 more source
η-Ricci Solitons on Kenmotsu 3-Manifolds
Annals of the West University of Timisoara: Mathematics and Computer Science, 2018 In the present paper we study η-Ricci solitons on Kenmotsu 3-manifolds. Moreover, we consider η-Ricci solitons on Kenmotsu 3-manifolds with Codazzi type of Ricci tensor and cyclic parallel Ricci tensor.
De Krishnendu, De Uday Chand
doaj +1 more source
Neuropathology and Applied Neurobiology, Volume 52, Issue 5, October 2026.A cohort of 92 meningiomas was reclassified according to CNS WHO 2021. Diagnostic concordance between different CDKN2A/B homozygous deletion cutoffs assessed by FISH and MTAP/p16 immunohistochemistry was evaluated, with the aim to improve meningioma diagnostic workflow and prognostic estimation.
Alessia Andrea Ricci +13 more
wiley +1 more source
On the equivalence of generalized Ricci curvatures
Proceedings of the American Mathematical SocietyWe prove the equivalence between the several notions of generalized Ricci curvature found in the literature. As an application, we characterize when the total generalized Ricci tensor is symmetric.
Cavalcanti, Gil r. +2 more
openaire +4 more sources
Magnetic Reconnection Driven by the Impact of a Magnetosheath High‐Speed Jet
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract High‐speed jets (HSJs) are transient structures in the magnetosheath characterized by enhanced dynamic pressure. While recent studies report that HSJs trigger magnetic reconnection at the magnetopause, whether they can directly drive reconnection within the magnetosheath remains an open question.
Jiuqi Ma +8 more
wiley +1 more source
POSITIVITY OF RICCI CURVATURE UNDER THE KÄHLER–RICCI FLOW [PDF]
Communications in Contemporary Mathematics, 2006 In each complex dimension n ≥ 2, we construct complete Kähler manifolds of bounded curvature and non-negative Ricci curvature whose Kähler–Ricci evolutions immediately acquire Ricci curvature of mixed sign.
openaire +2 more sources
On Almost Nonpositive k-Ricci Curvature
The Journal of Geometric Analysis, 2022 10 ...
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Polymer Composites, Volume 47, Issue 18, Page 16649-16665, 20 September 2026.Effect of nanosilica aggregates/agglomerates on oxygen and water vapor diffusivity of PBF/SiO2 nanocomposites. ABSTRACT The nanofillers inclusions in poly(butylene 2,5‐furandicarboxylate) (PBF)/SiO2 nanocomposites were found to consist of aggregates and agglomerates of nanosilica particles.
Giovanna Molinari +9 more
wiley +1 more source
Protein Science, Volume 35, Issue 9, September 2026.Abstract Glucagon is a well‐established therapeutic peptide, widely used to treat hypoglycemia. Like many peptide drugs, it offers advantages such as specificity, biocompatibility, and high affinity for receptor targets, but suffers from limited physical and chemical stability.
Angelo Santoro +4 more
wiley +1 more source
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 +2 more
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