### The f-sectional curvature of f-Kaehlerian manifolds

Barbara Opozda (1983)

Annales Polonici Mathematici

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Barbara Opozda (1983)

Annales Polonici Mathematici

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Lohkamp, Joachim (1998)

Documenta Mathematica

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Di Scala, Antonio J. (2005)

Revista Colombiana de Matemáticas

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Hukum Singh (1985)

Publications de l'Institut Mathématique

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Dursun, Uǧur (2006)

Balkan Journal of Geometry and its Applications (BJGA)

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Lotta, Antonio (1998)

Balkan Journal of Geometry and its Applications (BJGA)

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Brent Collins (2001)

Visual Mathematics

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Gupta, Ram Shankar, Haider, S.M.Khrusheed, Sharfuddin, A. (2006)

Balkan Journal of Geometry and its Applications (BJGA)

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Ziqi Sun (2003)

Colloquium Mathematicae

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Let M be an n-dimensional complete immersed submanifold with parallel mean curvature vectors in an (n+p)-dimensional Riemannian manifold N of constant curvature c > 0. Denote the square of length and the length of the trace of the second fundamental tensor of M by S and H, respectively. We prove that if S ≤ 1/(n-1) H² + 2c, n ≥ 4, or S ≤ 1/2 H² + min(2,(3p-3)/(2p-3))c, n = 3, then M is umbilical. This result generalizes the...

Kumar, Rakesh, Rani, Rachna, Nagaich, R.K. (2007)

International Journal of Mathematics and Mathematical Sciences

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Endo, Hiroshi (2005)

APPS. Applied Sciences

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Iyigün, Esen (2002)

APPS. Applied Sciences

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Haesen, Stefan, Verpoort, Steven (2010)

Beiträge zur Algebra und Geometrie

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Paweł Grzegorz Walczak (1984)

Banach Center Publications

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Christos Baikoussis, Themis Koufogiorgos (1988)

Colloquium Mathematicae

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