Results 11 to 20 of about 1,568,392 (257)

On Sectional Curvatures of (ε)-Sasakian Manifolds [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2007
We obtain some basic results for Riemannian curvature tensor of (ε)-Sasakian manifolds and then establish equivalent relations among φ-sectional curvature, totally real sectional curvature, and totally real bisectional curvature for (ε)-Sasakian ...
Rakesh Kumar   +2 more
doaj   +2 more sources

Sectional and Ricci Curvature for Three-Dimensional Lie Groups [PDF]

open access: yesJournal of Mathematics, 2016
Formulas for the Riemann and Ricci curvature tensors of an invariant metric on a Lie group are determined. The results are applied to a systematic study of the curvature properties of invariant metrics on three-dimensional Lie groups.
Gerard Thompson, Giriraj Bhattarai
doaj   +2 more sources

Holomorphic Sectional Curvature of Complex Finsler Manifolds. [PDF]

open access: yesJ Geom Anal, 2019
In this paper, we get an inequality in terms of holomorphic sectional curvature of complex Finsler metrics. As applications, we prove a Schwarz Lemma from a complete Riemannian manifold to a complex Finsler manifold.
Wan X.
europepmc   +2 more sources

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

open access: yes, 2010
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
Wu, Bing Ye
core   +1 more source

Real hypersurfaces with constant totally real sectional curvature in a complex space form [PDF]

open access: yes, 2000
summary:We characterize real hypersurfaces with constant holomorphic sectional curvature of a non flat complex space form as the ones which have constant totally real sectional ...
Pérez, Juan de Dios   +2 more
core   +1 more source

Study of Morphometry of Clavicle in East Indian Population [PDF]

open access: yesInternational Journal of Anatomy Radiology and Surgery, 2021
Introduction: The clavicle is a subcutaneous bone most frequently fractured at the junction of medial 2/3rd and lateral 1/3rd of its shaft. The knowledge about the morphometry of clavicle is important for surgeons as well as orthopaedic surgeons. Aim:
BANANI KUNDU   +2 more
doaj   +1 more source

Characterization of Holomorphic Bisectional Curvature of GCR-Lightlike Submanifolds

open access: yesAdvances in Mathematical Physics, 2012
We obtain the expressions for sectional curvature, holomorphic sectional curvature, and holomorphic bisectional curvature of a GCR-lightlike submanifold of an indefinite Kaehler manifold.
Sangeet Kumar   +2 more
doaj   +1 more source

On the quaternion projective space

open access: yesJournal of Taibah University for Science, 2020
Apart from being a vital and exciting field in mathematics with interesting results, projective spaces have various applications in design theory, coding theory, physics, combinatorics, number theory and extremal combinatorial problems. In this paper, we
Y. Omar   +4 more
doaj   +1 more source

On the Tachibana numbers of closed manifolds with pinched negative sectional curvature

open access: yesДифференциальная геометрия многообразий фигур, 2020
Conformal Killing form is a natural generalization of con­formal Killing vector field. These forms were exten­si­vely studied by many geometricians. These considerations we­re motivated by existence of various applications for the­se forms.
S.E. Stepanov, I. I. Tsyganok
doaj   +1 more source

Mixed sectional-Ricci curvature obstructions on tori

open access: yes, 2020
International audienceWe establish new obstruction results to the existence of Riemannian metrics on tori satisfying mixed bounds on both their sectional and Ricci curvatures.
Kloeckner, Benoît, Sabourau, Stéphane
core   +1 more source

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