Results 51 to 60 of about 283,922 (217)
Ricci curvatures on Hermitian manifolds
Transactions of the American Mathematical Society, 2017 In this paper, we introduce the first Aeppli-Chern class for complex manifolds and show that the ( 1 , 1
Liu, Kefeng, Yang, Xiaokui
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An axially symmetric spacetime with causality violation in Ricci-inverse gravity
European Physical Journal C: Particles and Fields, 2023 In this paper, Ricci-inverse gravity is investigated. It is an alternative theory of gravity that introduces into the Einstein–Hilbert action an anti-curvature scalar that is obtained from the anti-curvature tensor which is the inverse of the Ricci ...
J. C. R. de Souza, A. F. Santos
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Kropina Metrics with Isotropic Scalar Curvature
Axioms, 2023 In this paper, we study Kropina metrics with isotropic scalar curvature. First, we obtain the expressions of Ricci curvature tensor and scalar curvature. Then, we characterize the Kropina metrics with isotropic scalar curvature on by tensor analysis.
Liulin Liu, Xiaoling Zhang, Lili Zhao
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Modified Ricci flow on a principal bundle [PDF]
, 2008 textLet M be a Riemannian manifold with metric g, and let P be a principal G-bundle over M having connection one-form a. One can define a modified version of the Ricci flow on P by fixing the size of the fiber.
Young, Andrea Nicole, 1979-
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The Ricci curvature in noncommutative geometry [PDF]
Journal of Noncommutative Geometry, 2019 Motivated by the local formulae for asymptotic expansion of heat kernels in spectral geometry, we propose a definition of Ricci curvature in noncommutative settings. The Ricci operator of an oriented closed Riemannian manifold can be realized as a spectral functional, namely the functional defined by the zeta function of the full Laplacian of the de ...
Remus Floricel +2 more
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Compact Manifolds With Unbounded Nilpotent Fundamental Groups and Positive Ricci Curvature
Communications on Pure and Applied Mathematics, EarlyView.ABSTRACT It follows from the work of Kapovitch and Wilking that a closed manifold with nonnegative Ricci curvature has a uniformly almost nilpotent fundamental group. Leftover questions and conjectures, have asked if in this context the fundamental group is actually uniformly almost abelian. The main goal of this work is to construct examples (Mk9,gk)$(
Elia Bruè, Aaron Naber, Daniele Semola
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The Ricci curvature on simplicial complexes [PDF]
, 2022 We define the Ricci curvature on simplicial complexes by modifying the definition of the Ricci curvature on graphs, and we prove the upper and lower bounds of the Ricci curvature. These properties are generalizations of previous studies.
Yamada, Taiki
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Ricci Curvature Inequalities for Skew CR-Warped Product Submanifolds in Complex Space Forms
Mathematics, 2020 The fundamental goal of this study was to achieve the Ricci curvature inequalities for a skew CR-warped product (SCR W-P) submanifold isometrically immersed in a complex space form (CSF) in the expressions of the squared norm of mean curvature vector and
Meraj Ali Khan, Ibrahim Aldayel
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Ultrasound Findings in Symptomatic HADD of the Hand and Wrist. A Case Series of 37 Patients
Journal of Clinical Ultrasound, EarlyView.Ultrasound enables accurate diagnosis of hydroxyapatite deposition disease of the hand and wrist in patients with acute, non‐traumatic pain, typically in middle‐aged women. Characteristic calcifications, often in the resorptive phase, support diagnosis, while radiography may confirm findings without the need for advanced imaging.
Marco Becciolini +3 more
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Ricci curvature, graphs and eigenvalues
, 2021 Siconolfi V. Ricci curvature, graphs and eigenvalues. Linear Algebra and its Applications. 2021;620:242-267.We express the discrete Ricci curvature of a graph as the minimal eigenvalue of a family of matrices, one for each vertex of a graph whose entries
Siconolfi, Viola, Viola Siconolfi
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