Results 51 to 60 of about 136 (90)

On invariant submanifolds of lorentzian para-sasakian manifolds

, 2009
We consider semiparallel and 2-semiparallel invariant submanifolds of Lorentzian para-Sasakian manifolds. We show that these submanifolds are totally geodesic.
Özgür, Cihan
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Isometric immersions into 3-dimensional Lorentzians homogeneous manifolds

, 2012
Neste trabalho, provamos um teorema de imersões isométricas em variedades Lorentzianas homogêneas tridimensionais, usando a teoria de G- estruturas. Tais variedades são aquelas consideradas na classificação das 3- variedades Lorentzianas homogêneas de ...
Manfio, Fernando
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Cones over pseudo-Riemannian manifolds and their holonomy

, 2009
Copyright © 2009 Walter de GruyterBy a classical theorem of Gallot (1979), a Riemannian cone over a complete Riemannian manifold is either flat or has irreducible holonomy. We consider metric cones with reducible holonomy over pseudo-Riemannian manifolds.
Alekseevsky, D., Galaev, A., Leistner, T., Cortes, V.   +3 more
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Minimal surfaces in lorentzian manifolds

, 2018
Orientadores: Francesco Mercuri, Irene Ignazia OnnisTese (doutorado) - Universidade Estadual de Campinas, Instituto de Matemática Estatística e Computação CientíficaResumo: Nesta tese estudamos as superfícies mínimas imersas em variedades Lorentzianas ...
Cintra, Adriana Araujo, 1985-
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Characterization of the Lorentzian para-Sasakian manifolds admitting a quarter-symmetric non-metric connection [PDF]

, 2019
We set the goal to study the properties of LP-Sasakian manifolds equipped with a quarter-symmetric non-metric connection. It is proved that the LP-Sasakian manifold endowed with a quarter-symmetric non-metric con- nection is partially Ricci semisymmetric
Uday Chand De, Sudhakar Kr Chaubey
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$\eta $-Ricci Solitons on $\eta $-Einstein $(LCS)_n$-Manifolds

, 2016
summary:The object of the present paper is to study $\eta $-Ricci solitons on $\eta $-Einstein $(LCS)_n$-manifolds. It is shown that if $\xi $ is a recurrent torse forming $\eta $-Ricci soliton on an $\eta $-Einstein $(LCS)_n$-manifold then $\xi $ is (i)
Hui, Shyamal Kumar, Chakraborty, Debabrata   +1 more
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Pseudosymmetric and Weyl-pseudosymmetric $(\kappa , \mu )$-contact metric manifolds

, 2016
summary:In this paper we classify pseudosymmetric and Ricci-pseudosymmetric $(\kappa , \mu )$-contact metric manifolds in the sense of Deszcz.
Malekzadeh, N., De, U.C., Abedi, E.
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Biharmonic curves in Lorentzian Para-Sasakian manifolds

, 2010
In this paper we give necessary and sucient conditions for space- like and timelike curves in a conformally at, quasi conformally at and conformally symmetric 4-dimensional Lorentzian Para-Sasakian (LP-Sasakian) manifold to be proper biharmonic. Also, we
Husna Zayadi
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Conexidade geodésica e existência de geodésica tipo-tempo fechada em variedades de Lorentz

, 2022
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Matemática Pura e Aplicada, Florianópolis, 2022.Neste trabalho estudamos dois problemas clássicos da geometria diferencial ...
Honorato, Kledilson Peter Ribeiro
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A Conformal η-Ricci Soliton on a Four-Dimensional Lorentzian Para-Sasakian Manifold

This paper focuses on some geometrical and physical properties of a conformal η-Ricci soliton (Cη-RS) on a four-dimension Lorentzian Para-Sasakian (LP-S) manifold.
Mića S. Stanković, Yanlin Li, Arindam Bhattacharyya, Arup Kumar Mallick   +3 more
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