Results 51 to 60 of about 409,873 (273)

On generalized complex space forms satisfying certain curvature conditions

Karpatsʹkì Matematičnì Publìkacìï, 2016
We study Ricci soliton $(g,V,\lambda)$ of generalized complex space forms when the Riemannian, Bochner and $W_{2}$ curvature tensors satisfy certain curvature conditions like semi-symmetric, Einstein semi-symmetric, Ricci pseudo symmetric and Ricci ...
M.M. Praveena, C.S. Bagewadi
doaj   +1 more source

Non-collapsed spaces with Ricci curvature bounded from below [PDF]

, 2017
We propose a definition of non-collapsed space with Ricci curvature bounded from below and we prove the versions of Colding's volume convergence theorem and of Cheeger-Colding dimension gap estimate for ${\sf RCD}$ spaces. In particular this establishes
G. Philippis, N. Gigli
semanticscholar   +1 more source

Ricci curvature and betti numbers [PDF]

Journal of Geometric Analysis, 1997
18pages ...
openaire   +4 more sources

On the Signature of the Ricci Curvature on Nilmanifolds [PDF]

Transformation Groups, 2022
11 ...
Arroyo, Romina M., Lafuente, Ramiro A.
openaire   +2 more sources

Estimates on the non-compact expanding gradient Ricci solitons

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2013
In this paper, we deal with the complete non-compact expanding gradient Ricci soliton (Mn,g) with positive Ricci curvature. On the condition that the Ricci curvature is positive and the scalar curvature approaches 0 towards infinity, we derive a useful ...
Gao Xiang, Xing Qiaofang, Cao Rongrong
doaj   +1 more source

Ricci Curvature, Isoperimetry and a Non-additive Entropy

Entropy, 2015
Searching for the dynamical foundations of Havrda-Charvát/Daróczy/ Cressie-Read/Tsallis non-additive entropy, we come across a covariant quantity called, alternatively, a generalized Ricci curvature, an N-Ricci curvature or a Bakry-Émery-Ricci curvature ...
Nikos Kalogeropoulos
doaj   +1 more source

Inequality for Ricci curvature of certain submanifolds in locally conformal almost cosymplectic manifolds

International Journal of Mathematics and Mathematical Sciences, 2005
We establish inequalities between the Ricci curvature and the squared mean curvature, and also between the k-Ricci curvature and the scalar curvature for a slant, semi-slant, and bi-slant submanifold in a locally conformal almost cosymplectic manifold ...
Dae Won Yoon
doaj   +1 more source

Applications of Fast Iterative Filtering in NMR Spectroscopy: Baseline Correction. [PDF]

Magn Reson Chem
Fast iterative filtering is a signal decomposition technique related to empirical mode decomposition. When decomposing NMR data into intrinsic mode functions, FIF effectively partitions broad baseline components from narrow peaks components, even in heavily distorted spectra, for instance, those of paramagnetic compounds.
Fiorucci L, Bruno F, Ricci M, Cicone A, Ravera E.   +4 more
europepmc   +2 more sources

Levi-Civita Ricci-Flat Doubly Warped Product Hermitian Manifolds

Advances in Mathematical Physics, 2022
Let M1,g and M2,h be two Hermitian manifolds. The doubly warped product (abbreviated as DWP) Hermitian manifold of M1,g and M2,h is the product manifold M1×M2 endowed with the warped product Hermitian metric G=f22g+f12h, where f1 and f2 are positive ...
Qihui Ni, Yong He, Jinhua Yang, Hui Zhang   +3 more
doaj   +1 more source

Characterizing complex networks with Forman-Ricci curvature and associated geometric flows [PDF]

J. Complex Networks, 2016
We introduce Forman-Ricci curvature and its corresponding flow as characteristics for complex networks attempting to extend the common approach of node-based network analysis by edge-based characteristics.
Melanie Weber, Emil Saucan, J. Jost
semanticscholar   +1 more source