D-conharmonic change in a special para-Sasakian manifold.
Prvanović, Mileva (1991)
Mathematica Pannonica
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Prvanović, Mileva (1991)
Mathematica Pannonica
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Matsumoto, Koji (1985)
International Journal of Mathematics and Mathematical Sciences
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Ganchev, Georgi, Gribachev, Kostadin, Mikhova, Vesselka (1987)
Publications de l'Institut Mathématique. Nouvelle Série
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Mileva Prvanović (2010)
Bulletin, Classe des Sciences Mathématiques et Naturelles, Sciences mathématiques
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Debasish Tarafdar, U. C. De (1993)
Extracta Mathematicae
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Sharief Deshmukh, Falleh Al-Solamy (2008)
Colloquium Mathematicae
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It is proved that if an n-dimensional compact connected Riemannian manifold (M,g) with Ricci curvature Ric satisfying 0 < Ric ≤ (n-1)(2-nc/λ₁)c for a constant c admits a nonzero conformal gradient vector field, then it is isometric to Sⁿ(c), where λ₁ is the first nonzero eigenvalue of the Laplacian operator on M. Also, it is observed that existence of a nonzero conformal gradient vector field on an n-dimensional compact connected Einstein manifold...
Özgür, Cihan, De, Uday Chand (2006)
Mathematica Pannonica
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Endo, Hiroshi (1994)
Publications de l'Institut Mathématique. Nouvelle Série
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Begewadi, C.S., Kumar, E.Girish, Venkatesha (2005)
Novi Sad Journal of Mathematics
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Ewert-Krzemieniewski, Stanislaw (2003)
Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]
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Samuel I. Goldberg, Izu Vaisman (1980)
Annales de la Faculté des sciences de Toulouse : Mathématiques
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Dorota Łuczyszyn (2005)
Open Mathematics
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Let B be the Bochner curvature tensor of a para-Kählerian manifold. It is proved that if the manifold is Bochner parallel (∇ B = 0), then it is Bochner flat (B = 0) or locally symmetric (∇ R = 0). Moreover, we define the notion of tha paraholomorphic pseudosymmetry of a para-Kählerian manifold. We find necessary and sufficient conditions for a Bochner flat para-Kählerian manifold to be paraholomorphically pseudosymmetric. Especially, in the case when the Ricci operator is diagonalizable,...
Khan, Quddus (2006)
Novi Sad Journal of Mathematics
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