scholarly journals Nonexistence of Totally Contact Umbilical Slant Lightlike Submanifolds of Indefinite Cosymplectic Manifolds

ISRN Geometry ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Rashmi Sachdeva ◽  
Rakesh Kumar ◽  
Satvinder Singh Bhatia
Keyword(s):  
Space Forms ◽  
Cosymplectic Manifolds ◽  
Characterization Theorems ◽  
Lightlike Submanifolds

We study totally contact umbilical slant lightlike submanifolds of indefinite cosymplectic manifolds. We prove that there do not exist totally contact umbilical proper slant lightlike submanifolds in indefinite cosymplectic manifolds other than totally contact geodesic proper slant lightlike submanifolds. We also prove that there do not exist totally contact umbilical proper slant lightlike submanifolds of indefinite cosymplectic space forms. Finally we give characterization theorems on minimal slant lightlike submanifolds.

scholarly journals Totally contact umbilical slant lightlike submanifolds of indefinite Kenmotsu manifolds

2015 ◽  
Vol 46 (2) ◽  
pp. 179-191
Author(s):  
Rashmi Schdeva ◽  
Rakesh Kumar ◽  
Satvinder Singh Bhatia
Keyword(s):  
Space Forms ◽  
Kenmotsu Manifolds ◽  
Characterization Theorems ◽  
Lightlike Submanifolds ◽  
Lightlike Submanifold

In this paper, we study totally contact umbilical slant lightlike submanifolds of indefinite Kenmotsu manifolds. We prove that there does not exist totally contact umbilical proper slant lightlike submanifold in indefinite Kenmotsu manifolds other than totally contact geodesic proper slant lightlike submanifold. We also prove that there does not exist totally contact umbilical proper slant lightlike submanifold of indefinite Kenmotsu space forms. Finally, we give some characterization theorems on minimal slant lightlike submanifolds of indefinite Kenmotsu manifolds.

Screen slant lightlike submanifolds of indefinite cosymplectic manifolds

2011 ◽  
Vol 18 (1) ◽  
pp. 83-97
Author(s):  
Ram Shankar Gupta
Keyword(s):  
Characterization Theorem ◽  
Cosymplectic Manifold ◽  
Cosymplectic Manifolds ◽  
Characterization Theorems ◽  
Lightlike Submanifolds ◽  
Lightlike Submanifold

Abstract In this paper, we introduce the notion of a screen slant lightlike submanifold of an indefinite cosymplectic manifold. We provide a characterization theorem for the existence of a screen slant lightlike submanifold with examples. Also, we give an example of a minimal screen slant lightlike submanifold of and prove some characterization theorems.

scholarly journals OnGCR-Lightlike Product of Indefinite Cosymplectic Manifolds

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Varun Jain ◽  
Rakesh Kumar ◽  
R. K. Nagaich
Keyword(s):  
Cosymplectic Manifolds ◽  
Characterization Theorems ◽  
Lightlike Submanifolds ◽  
Lightlike Submanifold

We defineGCR-lightlike submanifolds of indefinite cosymplectic manifolds and give an example. Then, we study mixed geodesicGCR-lightlike submanifolds of indefinite cosymplectic manifolds and obtain some characterization theorems for aGCR-lightlike submanifold to be aGCR-lightlike product.

scholarly journals Lightlike Hypersurfaces of Indefinite Generalized Sasakian Space Forms

2015 ◽  
Vol 2015 ◽  
pp. 1-9
Author(s):  
Dae Ho Jin
Keyword(s):  
Vector Field ◽  
Space Form ◽  
Sasakian Manifold ◽  
Sasakian Space Form ◽  
Space Forms ◽  
Sasakian Structure ◽  
Sasakian Space Forms ◽  
Generalized Sasakian Space Form ◽  
Characterization Theorems ◽  
Lightlike Hypersurfaces

We study lightlike hypersurfacesMof an indefinite generalized Sasakian space formM-(f1,f2,f3), with indefinite trans-Sasakian structure of type(α,β), subject to the condition that the structure vector field ofM-is tangent toM. First we study the general theory for lightlike hypersurfaces of indefinite trans-Sasakian manifold of type(α,β). Next we prove several characterization theorems for lightlike hypersurfaces of an indefinite generalized Sasakian space form.

Slant Lightlike Submanifolds of Indefinite Cosymplectic Manifolds

2010 ◽  
Vol 8 (2) ◽  
pp. 215-227 ◽  
Author(s):  
Ram Shankar Gupta ◽  
Abhitosh Upadhyay ◽  
A. Sharfuddin
Keyword(s):  
Cosymplectic Manifolds ◽  
Lightlike Submanifolds

Radical screen transversal lightlike submanifolds of indefinite Kaehler manifolds admitting a quarter-symmetric non-metric connection

2018 ◽  
Vol 15 (02) ◽  
pp. 1850024
Author(s):  
Garima Gupta ◽  
Rakesh Kumar ◽  
Rakesh Kumar Nagaich
Keyword(s):  
Product Manifold ◽  
Necessary And Sufficient Condition ◽  
Kaehler Manifold ◽  
Screen Distribution ◽  
Kaehler Manifolds ◽  
Metric Connection ◽  
Necessary And Sufficient ◽  
Characterization Theorems ◽  
Lightlike Submanifolds ◽  
Lightlike Submanifold

We study radical screen transversal ([Formula: see text])-lightlike submanifolds of an indefinite Kaehler manifold admitting a quarter-symmetric non-metric connection and obtain a necessary and sufficient condition for the screen distribution of a radical [Formula: see text]-lightlike submanifold to be integrable. We also study totally umbilical radical [Formula: see text]-lightlike submanifolds and obtain some characterization theorems for a radical [Formula: see text]-lightlike submanifold to be a lightlike product manifold. Finally, we establish some results regarding the vanishes of null sectional curvature.

Some characterizations on minimal lightlike submanifolds

2017 ◽  
Vol 14 (07) ◽  
pp. 1750103 ◽  
Author(s):  
Sangeet Kumar
Keyword(s):  
Sectional Curvature ◽  
Ricci Tensor ◽  
Minimal Condition ◽  
Characterization Theorems ◽  
Lightlike Submanifolds ◽  
Lightlike Submanifold

The present paper deals with the study of minimal lightlike submanifolds. We investigate a class of lightlike submanifolds namely, generic lightlike submanifolds under the minimal condition. We give one nontrivial example for minimal generic lightlike submanifolds and derive some characterization theorems for a generic lightlike submanifold to be a minimal lightlike submanifold. We also establish some conditions for the distributions for generic lightlike submanifolds to be minimal. We further derive the expressions for sectional curvature, null sectional curvature and induced Ricci tensor for a minimal lightlike submanifold. Finally, we prove that for a minimal lightlike submanifold, the null sectional curvature vanishes and the induced Ricci tensor is symmetric.

scholarly journals Characterization of Holomorphic Bisectional Curvature ofGCR-Lightlike Submanifolds

2012 ◽  
Vol 2012 ◽  
pp. 1-18 ◽  
Author(s):  
Sangeet Kumar ◽  
Rakesh Kumar ◽  
R. K. Nagaich
Keyword(s):  
Sectional Curvature ◽  
Complex Space ◽  
Space Form ◽  
Complex Space Form ◽  
Holomorphic Sectional Curvature ◽  
Bisectional Curvature ◽  
Holomorphic Bisectional Curvature ◽  
Characterization Theorems ◽  
Lightlike Submanifolds ◽  
Lightlike Submanifold

We obtain the expressions for sectional curvature, holomorphic sectional curvature, and holomorphic bisectional curvature of aGCR-lightlike submanifold of an indefinite Kaehler manifold. We discuss the boundedness of holomorphic sectional curvature ofGCR-lightlike submanifolds of an indefinite complex space form. We establish a condition for aGCR-lightlike submanifold of an indefinite complex space form to be null holomorphically flat. We also obtain some characterization theorems for holomorphic sectional and holomorphic bisectional curvature.

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