Results 51 to 60 of about 571,031 (268)
Nonnegative curvature and conullity of the curvature tensor [PDF]
Annals of Global Analysis and Geometry, 2019 The conullity of a curvature tensor is the codimension of its kernel. We consider the cases of conullity two in any dimension and conullity three in dimension four. We show that these conditions are compatible with non-negative sectional curvature only if either the manifold is diffeomorphic to $\mathbb{R}^n$ or the universal cover is an isometric ...
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Dentistry Journal, 2023 Models of artificial root canals are used in several fields of endodontic investigations and pre-clinical endodontic training. They allow the physical testing of dental treatments, the operating of instruments used and the interaction between these ...
Michael Kucher +5 more
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Kropina metrics with isotropic scalar curvature [PDF]
arXiv, 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.
arxiv
Ricci curvature for metric-measure spaces via optimal transport [PDF]
, 2004 We dene a notion of a measured length space X having nonnegative N-Ricci curvature, for N 2 [1;1), or having1-Ricci curvature bounded below byK, forK2 R.
J. Lott, C. Villani
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Curvature Change in Laser-Assisted Bending of Inconel 718
Physical Sciences Forum, 2022 Laser heating is industrially applied to facilitate plastic shaping, especially for materials difficult to form due to their high hardness or brittleness.
Jacek Widłaszewski +3 more
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Curvature estimates for constant mean curvature surfaces [PDF]
Duke Mathematical Journal, 2019 We have separated the original paper into two parts. This new posting is the first part which is self-contained and deals with extrinsic curvature estimates for embedded nonzero constant mean curvature disks.
H. Meeks III, William +1 more
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Study on the Curvature Reducing Method of Non-linear Regression Model
MATEC Web of Conferences, 2016 The method to reduce the non-linear strength (curvature)of non-linear regression model was studied in this paper. Firstly, the reference point of the non-linear strength was analyzed.
Wu Jin-mei +4 more
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Membrane curvature underlies actin reorganization in response to nanoscale surface topography
Proceedings of the National Academy of Sciences of the United States of America, 2019 Significance Despite a large body of work, little is known about the origin or underlying mechanisms of how cells interact with surface topographic patterns, which has resulted in a primarily phenomenological approach in studying cell–nanotopography ...
Hsin-Ya Lou +10 more
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The Graph Curvature Calculator and the Curvatures of Cubic Graphs [PDF]
Experimental Mathematics, 2019 We classify all cubic graphs with either non-negative Ollivier-Ricci curvature or non-negative Bakry-Émery curvature everywhere. We show in both curvature notions that the non-negatively curved graphs are the prism graphs and the Möbius ladders. We also highlight an online tool for calculating the curvature of graphs under several variants of these ...
Cushing, David +5 more
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ISPRS International Journal of Geo-Information, 2019 Topographic features impact biomass and other agriculturally relevant observables. However, conventional tools for processing digital elevation model (DEM) data in geographic information systems have severe limitations. Typically, 3-by-3 window sizes are
Rahul Gomes, Anne Denton, David Franzen
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