The differential geometry of almost Hermitian almost contact metric submersions.
Tshikuna-Matamba, T. (2004)
International Journal of Mathematics and Mathematical Sciences
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Tshikuna-Matamba, T. (2004)
International Journal of Mathematics and Mathematical Sciences
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Ana Dorotea Tarrío Tobar (1987)
Extracta Mathematicae
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Vasile Oproiu, Neculai Papaghiuc (2005)
Colloquium Mathematicae
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In [11] we have considered a family of almost anti-Hermitian structures (G,J) on the tangent bundle TM of a Riemannian manifold (M,g), where the almost complex structure J is a natural lift of g to TM interchanging the vertical and horizontal distributions VTM and HTM and the metric G is a natural lift of g of Sasaki type, with the property of being anti-Hermitian with respect to J. Next, we have studied the conditions under which (TM,G,J) belongs to one of the eight classes of anti-Hermitian...
Edoardo Vesentini (1966)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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Blair, David (2002)
Serdica Mathematical Journal
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∗Research supported in part by NSF grant INT-9903302. In previous work a hyperbolic twistor space over a paraquaternionic Kähler manifold was defined, the fibre being the hyperboloid model of the hyperbolic plane with constant curvature −1. Two almost complex structures were defined on this twistor space and their properties studied. In the present paper we consider a twistor space over a paraquaternionic Kähler manifold with fibre given by the hyperboloid of 1-sheet,...
Simona-Luiza Druţă-Romaniuc (2012)
Czechoslovak Mathematical Journal
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We obtain the natural diagonal almost product and locally product structures on the total space of the cotangent bundle of a Riemannian manifold. Studying the compatibility and the anti-compatibility relations between the determined structures and a natural diagonal metric, we find the Riemannian almost product (locally product) and the (almost) para-Hermitian cotangent bundles of natural diagonal lift type. Finally, we prove the characterization theorem for the natural diagonal (almost)...
Bill Watson (2000)
Bollettino dell'Unione Matematica Italiana
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Se la varietà base, , di una submersione quasi-Hermitiana, , è una -varietà e le fibre sono subvarietà superminimali, allora lo spazio totale, , è . Se la varietà base, , è Hermitiana e le fibre sono subvarietà bidimensionali e superminimali, allora lo spazio totale, , è Hermitiano.