Results 11 to 20 of about 1,470,963 (294)

Experimental validation of the mechanical coupling response for hygro-thermally curvature-stable laminated composite materials [PDF]

open access: yes, 2011
Stacking sequence configurations for hygro-thermally curvature-stable (HTCS) laminates have recently been identified in 9 classes of coupled laminate with standard ply angle orientations +45, "1245, 0 and ...
Shamsudin, M.H.   +3 more
core   +9 more sources

On the sectional curvature of compact hypersurfaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1990
We establish a sufficient condition for compact hypersurfaces of a complete riemannian manifold to be spherical. It is well known, from the works of Jacobowitz, Jorge and Koutroufiotis, and others, that the maximum sectional curvature of such hypersurfaces can be estimated from the curvature of the ambient space and the outer radius.
Coghlan, Leslie, Itokawa, Yoe
openaire   +2 more sources

Differential phase tracking applied to Bragg gratings in multi-core fibre for high accuracy curvature measurement [PDF]

open access: yes, 2006
High resolution quasi-static and dynamic curvature measurements are made by differential interferometric phase measurement of fibre Bragg gratings in separate cores of a multi-core fibre.
Flockhart, G M H   +2 more
core   +4 more sources

K- constant type Kahler and Nearly Kahler manifolds for conharmonic curvature tensor

open access: yesTikrit Journal of Pure Science, 2023
The constant of permanence conharmonic type kahler and nearly kahler manifold conditions are obtained when the Nearly Kahler manifold is a manifold conharmonic constant type (K).
Ali A. Shihab, Rana H. jasim
doaj   +1 more source

Several Functions Originating from Fisher–Rao Geometry of Dirichlet Distributions and Involving Polygamma Functions

open access: yesMathematics, 2023
In this paper, the authors review and survey some results published since 2020 about (complete) monotonicity, inequalities, and their necessary and sufficient conditions for several newly introduced functions involving polygamma functions and originating
Feng Qi, Ravi Prakash Agarwal
doaj   +1 more source

Some rigidity theorems for Finsler manifolds of sectional flag curvature [PDF]

open access: yes, 2003
summary:In this paper we study some rigidity properties for Finsler manifolds of sectional flag curvature. We prove that any Landsberg manifold of non-zero sectional flag curvature and any closed Finsler manifold of negative sectional flag curvature must
Shen, ZM, Chen, XY, Mo, XH, Wu, Bing Ye
core   +1 more source

On the sectional curvature of lightlike submanifolds

open access: yesJournal of Inequalities and Applications, 2016
The main purpose of this paper is to show how to obtain rigidity theorems with the help of curvature invariants in submanifolds of a semi-Riemannian manifold.
Erol Kılıç, Mehmet Gülbahar
doaj   +1 more source

Mean curvature flow with triple junctions in higher space dimensions [PDF]

open access: yes, 2012
We consider mean curvature ow of n-dimensional surface clusters. At (
Garcke, Harald   +2 more
core   +1 more source

On generalized semisymmetric Riemannian manifolds

open access: yesAtti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2013
There are several generalizations of the concept of semi-symmetric Riemannian manifolds. In the present paper, we consider some special types of generalized semi-symmetric Riemannian manifolds with positive or negative defined curvature operator or ...
Josef Mikes, Sergey E. Stepanov
doaj   +1 more source

Four-manifolds of pinched sectional curvature

open access: yesPacific Journal of Mathematics, 2022
In this paper, we study closed four-dimensional manifolds. In particular, we show that under various new pinching curvature conditions (for example, the sectional curvature is no more than 5/6 of the smallest Ricci eigenvalue) then the manifold is definite.
Cao, Xiaodong, Tran, Hung
openaire   +3 more sources

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