Results 81 to 90 of about 220,418 (211)
Skew semi-invariant submanifolds of generalized quasi-Sasakian manifolds
Karpatsʹkì Matematičnì Publìkacìï, 2018 In the present paper, we study a new class of submanifolds of a generalized Quasi-Sasakian manifold, called skew semi-invariant submanifold. We obtain integrability conditions of the distributions on a skew semi-invariant submanifold and also find the ...
M.D. Siddiqi, A. Haseeb, M. Ahmad
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Homogeneous contact manifolds and almost Finsler manifolds [PDF]
Kodai Mathematical Journal, 1969 Yano, Kentaro, Mutô, Yosio
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Hypersurfaces in almost contact manifolds
Tohoku Mathematical Journal, 1969 Blair, D. E., Ludden, G. D.
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Admissible symplectic structures on distributions and codistributions of sub-Riemannian manifolds
Дифференциальная геометрия многообразий фигур, 2018 Extended almost contact metric structures are defined on distribution and codistribution of manifold with sub-Riemannian structure of contact type.
A. Bukusheva
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Admissible para-hyper-Kähler structures on distributions of almost contact metric manifolds
Дифференциальная геометрия многообразий фигур, 2018 The concepts of an admissible (almost) para-hyper-Kähler structure are introduced. On distribution of an almost contact metric manifold, as on the total space of a vector bundle, an admissible almost para-hypercomplex structure is defined.
S. Galaev
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On weakly Einstein almost contact manifolds
, 2019 In this article we study almost contact manifolds admitting weakly Einstein metrics. We first prove that if a (2n+1)-dimensional Sasakian manifold admits a weakly Einstein metric then its scalar curvature $s$ satisfies $-6\leqslant s \leqslant 6$ for $n=1$ and $-2n(2n+1)\frac{4n^2-4n+3}{4n^2-4n-1}\leqslant s \leqslant 2n(2n+1)$ for $n\geqslant2 ...
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Invariant submanifolds of an almost contact manifold
, 1969 K. Yano, S. Ishihara
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Generalized Harmonic Maps on Normal Almost Contact Manifolds
Rocky Mountain Journal of Mathematics, 2009 The author defines the \(\varphi\) -harmonic maps using adapted connections on normal almost contact manifolds. A number of conditions for a map to be \(\varphi\)-harmonic or generalized \(\varphi\)-pluriharmonic are given and some examples related to these results are found.
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On some almost contact metric hypersurfaces of W4-manifolds
Дифференциальная геометрия многообразий фигур, 2018 It is proved that 3-hypersurfaces of W4-manifolds admit an almost contact metric structures that can be identical to the structure induced on 2-hypersurfaces of such manifolds.
M. Banaru
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Harmonic almost contact metric manifolds revisited
, 2019 The study of harmonicity for almost contact metric structures was initiated by Vergara-D az and Wood and continued by Gonz lez-D vila and the present author. By using the intrinsic torsion and some restriction on the type of almost contact metric structure, Gonz lez-D vila and the present author have characterised harmonic structures by showing ...
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