POINTWISE SLANT SUBMERSIONS FROM KENMOTSU MANIFOLDS INTO RIEMANNIAN MANIFOLDS
|
|
- Samantha Bradley
- 5 years ago
- Views:
Transcription
1 ITALIAN JOURNAL OF PURE AND APPLIED MATHEMATICS N ( ) 561 POINTWISE SLANT SUBMERSIONS FROM KENMOTSU MANIFOLDS INTO RIEMANNIAN MANIFOLDS Sushil Kumar Department of Mathematics Astronomy University of Lucknow Lucknow (U.P.)-India Amit Kumar Rai University School of Basic Applied Scinces Guru Gobind singh Indraprastha University New Delhi-India Rajendra Prasad Department of Mathematics Astronomy University of Lucknow Lucknow (U.P.)-India Abstract. The purpose of this paper is to study pointwise slant submersions from Kenmotsu manifolds onto Riemannian manifolds admitting vertical horizontal structure vector fields find some results related to totally geodesic harmonic properties. Keywords: Riemannian submersion, almost contact manifold, pointwise slant submersion 1. Introduction Immersions submersions are special tools in Differential Geometry. Both play important role in Riemannian Geometry. O Neill [19] Gray [14] introduced Riemannian submersions between Riemannian manifolds. Submersions between Riemannian manifolds equipped with an additional structure of almost contact type on total space, firstly studied by Watson [23] Chinea [11] independently. We know that Riemannian submersions are related to Mathematical Physics have their applications in the Kaluza-Klein theory ([7], [16]) the Yang-Mills theory [6] etc. On the other h, submersions have been studied by several authors. Some related research papers are: Geometry of slant submanifolds [10], Slant submersions from almost Hermitian manifolds [20], Slant submanifolds of Lorentzian Sasakian para Sasakian manifolds [1], Riemannian submersions from almost. Corresponding author
2 SUSHIL KUMAR, AMIT KUMAR RAI, RAJENDRA PRASAD 562 contact metric manifolds [15], On quasi-slant submanifolds of an almost Hermitian manifold [12], Slant submanifolds in Sasakian manifolds [8], Pointwise slant submanifolds in almost Hermitian manifolds [9], Almost contact metric submersions [11], Riemannian Submersions Related Topics [13], Pointwise slant submersions [17], Slant submanifolds of a Riemannian product manifold [2], Slant submanifolds in contact geometry [18], Point-wise slant submanifolds in almost contact geometry [3], Pointwise slant submersions from Cosymplectic manifolds [21] etc. In this paper, we study pointwise slant submersions from Kenmotsu manifolds onto Riemannian manifolds. The paper is organized as follows. In section 2, we collect main notions formulae which are needed for this paper. In section 3, we obtain some results of pointwise slant submersions from Kenmotsu manifolds onto Riemannian manifolds admitting vertical horizontal structure vector fields. 2. Preliminaries Let M be an almost contact metric manifold. So there exist on M, a (1, 1) tensor field ϕ, a vector field ξ, a 1 form η a Riemannian metric g such that (2.1) (2.2) ϕ 2 = I + η ξ, ϕ ξ = 0, η ϕ = 0, g(x, ξ) = η(x), η(ξ) = 1, (2.3) g(ϕx, ϕy ) = g(x, Y ) η(x)η(y ), g(ϕx, Y ) = g(x, ϕy ), for any vector fields X Y on M I is the identity tensor field [5]. An almost contact metric manifold M equipped with an almost contact metric structure (ϕ, ξ, η, g) is denoted by (M, ϕ, ξ, η, g). An almost contact metric manifold M is called a Kenmotsu manifold if (2.4) ( X ϕ)y = g(ϕx, Y )ξ η(y )ϕx, for any vector fields X Y on M, where is the Riemannian connection of the Riemannian metric g. If (M, ϕ, ξ, η, g) be a Kenmotsu manifold, then the following equation holds: (2.5) X ξ = X η(x)ξ. Let M be an m dimensional Riemannian manifold N be an n dimensional Riemannian manifold (m > n) with Riemannian metrics g M g N respectively. Let f : (M, g M ) (N, g N ) be a C map. We denote the kernel space of f by ker f consider the orthogonal complementary space H = (ker f ) to ker f. Then the tangent bundle of M has the following decomposition (2.6) T M = (ker f ) (ker f ).
3 POINTWISE SLANT SUBMERSIONS We also denote the range of f by rangef consider the orthogonal complementary space (rangef ) to rangef in the tangent bundle T N of N. Thus the tangent bundle T N of N has the following decomposition (2.7) T N = (rangef ) (rangef ). A Riemannian submersion f is a C map from Riemannian manifold (M, g M ) onto (N, g N ) satisfying the following conditions: (i) f has the maximal rank, (ii) The differential f preserves the lengths of horizontal vectors. For each x N, f 1 (x) is fiber which is a (m n) dimensional submanifold of M. If a vector field on M is always tangent (resp. orthogonal) to fibers, then it is called vertical (resp. horizontal). A vector field X on M is said to basic if it is horizontal f related to a vector field X on N, i.e., f X p = X f(p) for all p M. We denote the projection morphisms on the distributions ker f (ker f ) by V H respectively. A smooth map f : (M, g M ) (N, g N ) between Riemannian manifolds is a Riemannian submersion if only if (2.8) g M (U, V ) = g N (f U, f V ), for every U, V (ker f ). The O Neill s tensors T A define by (2.9) (2.10) T E F = H VE VF + V VE HF, A E F = V HE HF + H HE VF, for arbitrary vector fields E F on M, where is the Riemannian connection on M [19]. Lemma 1. Let f be a Riemannian submersion between Riemannian manifolds (M, g M ) (N, g N ). If X Y are basic vector fields on M, then: (i) g M (X, Y ) = g N (f X, f Y ), (ii) the horizontal part [X, Y ] H of [X, Y ] is a basic vector field corresponds to [X, Y ] i.e., f ([X, Y ] H ) = [X, Y ], (iii) [V, X] is vertical for any vector field V of ker f, (iv) ( M X Y )H is vertical for any vector field corresponding to N X Y where M N are the Riemannian connection on M N respectively. Now, from equations (2.9) (2.10), we get (2.11) (2.12) (2.13) (2.14) X Y = T X Y + X Y, X V = H X V + T X V, V X = A V X + V V X, V W = H V W + A V W,
4 SUSHIL KUMAR, AMIT KUMAR RAI, RAJENDRA PRASAD 564 for X, Y Γ(ker f ) V, W Γ(ker f ), where X Y = V X Y. Moreover, if V is basic, then H X V = A V X. On the other h, for any E Γ(T M), it is seen that T is vertical, T E = T VE A is horizontal, A E = A HE. The tensor fields T A satisfy the equations: (2.15) (2.16) T X Y = T Y X, A V W = A W V = 1 V[V, W ], 2 for X, Y Γ(ker F ) V, W Γ(ker f ). It can be easily seen that a Riemannian submersion f : (M, g M ) (N, g N ) has totally geodesic fibers if only if T identically vanishes. Now, we consider the notion of harmonic maps between Riemannian manifolds. Let (M, g M ) (N, g N ) be Riemannian manifolds suppose that f is a C mapping between them. Then the differential f of f can be considered as a section of the bundle Hom(T M, f 1 T N) M, where f 1 T N is the pullback bundle that has fibers (f 1 T N) q = T f(q) N, q M. If Hom(T M, f 1 T N) has a connection induced from the Riemannian connection M, then the second fundamental form of f is given by (2.17) ( f )(X, Y ) = f X f Y f ( M X Y ), for any X, Y Γ(T M), where f is the pullback connection. If f is a Riemannian submersion, then we can easily see that (2.18) ( f )(V, W ) = 0, for any V, W Γ(ker f ) [4]. 3. The pointwise slant submersions from almost contact metric manifolds Let f be a Riemannian submersion from a Kenmotsu manifold (M, ϕ, ξ, η, g M ) onto a Riemannian manifold (N, g N ). If for each x M, the angle θ(x) between ϕx the space ker f is independent of the choice of the non-zero vector field X Γ(ker f ) {ξ}, then f is called a pointwise slant submersion the angle θ is said to be slant function of the pointwise slant submersion. A pointwise slant submersion is called slant if its slant function θ is independent of the choice of the point on (M, ϕ, ξ, η, g M ). Then the constant θ is called the slant angle of the slant submersion [21]. 3.1 Pointwise slant submersion for ξ Γ(ker f ) Let f be a Riemannian submersion from a Kenmotsu manifold (M, ϕ, ξ, η, g M ) onto a Riemannian manifold (N, g N ).
5 POINTWISE SLANT SUBMERSIONS For any X Γ(ker f ), we get (3.1) ϕx = ψx + ωx, where ψx ωx are vertical horizontal components of ϕx respectively. For any V Γ(ker f ), we have (3.2) ϕv = BV + CV, where BV CV are vertical horizontal components of ϕv respectively By using equations (2.3), (3.1) (3.2), we get (3.3) (3.4) g M (ψx, Y ) = g M (X, ψy ), g M (ωx, V ) = g M (X, BV ), for any X, Y Γ(ker f ) V Γ(ker f ). Again using the equations (2.5), (2.11), (2.13), (3.1) (3.2), we get (3.5) X ξ = X η(x)ξ, T X ξ = 0, for any X Γ(ker f ) V Γ(ker f ). For any X, Y Γ(ker f ), define (3.6) ( X ψ)y = X ψy ψ X Y, (3.7) ( X ω)y = H X ωy ω X Y, where is the Riemannian connection on M. Next, we say that the ω is parallel if (3.8) ( X ω)y = 0. Then we easily have: Lemma 2. Let (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. If f : (M, ϕ, ξ, η, g M ) (N, g N ) is a pointwise slant submersion, then (3.9) ( X ψ)y = BT X Y T X ωy g(ψx, Y )ξ + η(y )ψx, (3.10) ( X ω)y = CT X Y T X ψy + η(y )ωx, for any X, Y Γ(ker f ).
6 SUSHIL KUMAR, AMIT KUMAR RAI, RAJENDRA PRASAD 566 In the same way with the proof of Theorem 1 in [21], we have the following theorem: Theorem 1. If (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. If f : (M, ϕ, ξ, η, g M ) (N, g N ) is a pointwise slant submersion, then ψ 2 = cos 2 θ( I + η ξ). Simlarly, as in the proof of Lemma 2 in [21], we have Corollary 1. Let (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. If f : (M, ϕ, ξ, η, g M ) (N, g N ) is a pointwise slant submersion, then we have for any X, Y Γ(ker f ). g M (ψx, ψy ) = cos 2 θ(g M (X, Y ) η(x)η(y )), g M (ωx, ωy ) = sin 2 θ(g M (X, Y ) η(x)η(y )), In the same way with the proof of Lemma 3 in [21], we can state the following theorem: Theorem 2. Let (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. Assume that f : (M, ϕ, ξ, η, g M ) (N, g N ) is a pointwise slant submersion. If ω is parallel, then we have for any X Γ(ker f ). T ψx ψx = cos 2 θ(t X X η(x)ωψx), Let f be a C map from Riemannian manifold (M, g M ) onto (N, g N ), then the adjoint f map of f is characterized by (3.11) g M (X, f q Y ) = g N (f q X, Y ), for any X T q M, Y T f(q) N q M. For each q M, f h defined by is a C map f h : ((ker f ) (q), g M (ker f ) (q)) (rangef (q), g N (rangef )(q)), where denote the adjoint of f h by f h. Let f q be the adjoint of f q that is defined by f q : (T q M, g M ) (T f(q) N, g N ). The linear transformation ( f ) h : rangef (q) (ker f ) (q), defined as ( f ) h Y = f Y, where Y Γ(rangef ), is an isomorphism (f q) h 1 = ( f q ) h = (f q). h Theorem 3. Let (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. If f : (M, ϕ, ξ, η, g M ) (N, g N ) is a pointwise slant
7 POINTWISE SLANT SUBMERSIONS submersion with non-zero slant function θ, then the fibers are totally geodesic submanifolds of M if only if g N ( N V f (ωx), f (ωy )) = g M ([X, V ], Y ) sin 2 θ + V (θ)g M (ϕx, ϕy ) sin 2θ + g M (A V ωψx, Y ) g M (A V ωx, ψy ) η(y )g M (BV, ψx) η( V X)η(Y ) sin 2 θ, for any X, Y Γ(ker f ) V Γ(ker f ), where V V are f related vector fields N is the Riemannian connection on N. Proof. For any X, Y Γ(ker f ) V Γ(ker f ), using equations (2.3), (2.4), (2.11) (3.1), we get g M (T X Y, V ) = g M ([X, V ], Y ) + g M ( V ψ 2 X, Y ) + g M ( V ωψx, Y ) g M ( V ωx, ϕy ) η( V X)η(Y ). From theorem 1 using equations (2.11), (2.14) (3.2), we get g M (T X Y, V ) sin 2 θ = g M ([X, V ], Y ) sin 2 θ + V (θ)g M (ϕx, ϕy ) sin 2θ + g M (A V ωψx, Y ) g N ( N V f (ωx), f (ωy )) g M (A V ωx, ψy ) η( V X)η(Y )) sin 2 θ η(y )g M (BV, ψx). By considering the fibers as totally geodesic, we derive the formula in the above theorem. Conversely, it can be directly verified. Theorem 4. Let (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. If f : (M, ϕ, ξ, η, g M ) (N, g N ) be a pointwise slant submersion with non-zero slant function θ, then f is a totally geodesic map if only if g N ( N V f (ωx), f (ωy )) = g M ([X, V ], Y ) sin 2 θ + V (θ)g M (ϕx, ϕy ) sin 2θ + g M (A V ωψx, Y ) g M (A V ωx, ψy ) η(y )g M (BV, ψx) η( V X)η(Y ) sin 2 θ, g M (A V ωx, BW ) = g N ( f V f (ωψx), f (W )) g N ( f V f (ωx), f (CW )) η(x)g M (V, W ) sin 2 θ, for X, Y Γ(ker f ) V, W Γ(ker f ), where V V are f related vector fields f is the pullback connection along f.
8 SUSHIL KUMAR, AMIT KUMAR RAI, RAJENDRA PRASAD 568 Proof. By definition, it follows that f is totally geodesic if only if ( f )(X, Y ) = 0, for any X, Y Γ(T M). From theorem 3, we obtain the first equation. On the other h, for X, Y Γ(ker f ) V, W Γ(ker f ), using equations (2.3), (2.4) (3.1) we get g M ( V X, W ) = g M ( V ψ 2 X, W ) g M ( V ωψx, W ) + g M ( V ωx, ϕw ) + η(x)g M (V, W ). From theorem 1 using equations (2.8), (2.11), (2.14), (2.17) (3.2), we get Converse is obvious. g N (( f )(V, X), f (W )) sin 2 θ = g N ( f V f (ωx), f (W )) + g N ( f V f (ωx), f (CW )) + g M (A V ωx, BW ) + η(x)g M (V, W ) sin 2 θ. Theorem 5. Let (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. If f : (M, ϕ, ξ, η, g M ) (N, g N ) be a pointwise slant submersion with non-zero slant function θ, then f is harmonic if only if trace f (( f )((.)ωψ(.))) tracet (.) ω(.) + tracec f ( f )((.)ω(.)) = 0. Proof. For any X Γ(ker f ) V Γ(ker f ), using equations (2.1), (2.3), (2.11), (3.1) (3.2), we get g M (T X X, V ) = g M (ϕ X ψx, V ) + g M ( X ωx, ϕv ). From theorem 1 using equations (2.3), (2.4) (3.1), we get g M (T X X, V ) = g M ( X X, V ) cos 2 θ g M ( X ωψx, V ) + g M ( X ωx, ϕv ). Using equations (2.12), (2.17), (3.2) (3.11), we have g M (T X X, V ) sin 2 θ = g N ( f ( f )(X, ωψx), V ) g M (ωt X ωx, V ) g N (C f ( f )(X, ωx), V ). Conversely, a direct computation gives the proof. 3.2 Pointwise slant submersions for ξ Γ((ker f ) ) In this section, we give the basic equations of pointwise slant submersions from Kenmotsu manifolds onto Riemannian manifolds for ξ Γ(ker f ). From equations (2.1) (2.2), we get (3.12) ϕ 2 X = X,
9 POINTWISE SLANT SUBMERSIONS (3.13) g(ϕx, ϕy ) = g(x, Y ), for any X, Y Γ(ker f ). Moreover, from equations (2.12), (2.14), (2.5), (3.1) (3.2), we get (3.14) (3.15) T X ξ = X, A V ξ = 0, (3.16) η( X Y ) = g M (X, Y ), for any X, Y Γ(ker f ) V Γ(ker f ). Theorem 6. If (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. If f : (M, ϕ, ξ, η, g M ) (N, g N ) is a pointwise slant submersion, then ψ 2 = (cos 2 θ)i. Corollary 2. Let (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. If f : (M, ϕ, ξ, η, g M ) (N, g N ) be a pointwise slant submersion, then g M (ψx, ψy ) = cos 2 θg M (X, Y ), for any X, Y Γ(ker f ). g M (ωx, ωy ) = sin 2 θ(g M (X, Y ), Theorem 7. Let (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. Assume that f : (M, ϕ, ξ, η, g M ) (N, g N ) is a pointwise slant submersion with slant function θ. If ω is parallel, then for any X Γ(ker f ). T ψx ψx = cos 2 θt X X, Theorem 8. Let (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. If f : (M, ϕ, ξ, η, g M ) (N, g N ) is a pointwise slant submersion with non-zero slant function θ, then the fibers are totally geodesic submanifolds of M if only if g N ( N V f (ωx), f (ωy )) = g M ([X, V ], Y ) sin 2 θ + V (θ)g M (X, Y ) sin 2θ + g M (A V ωψx, Y ) g M (A V ωx, ψy ), for any X, Y Γ(ker f ) V Γ(ker f ), where V V are f related vector fields N is the Riemannian connection on N.
10 SUSHIL KUMAR, AMIT KUMAR RAI, RAJENDRA PRASAD 570 Proof. For any X, Y Γ(ker f ) V Γ(ker f ), using equations (2.2), (2.3), (2.4), (2.11), (2.14), (3.1), (3.2), (2.14) Theorem 6, we get g M (T X Y, V ) sin 2 θ = g M ([X, V ], Y ) sin 2 θ + V (θ)g M (X, Y ) sin 2θ + g M (A V ωψx, Y ) g N ( N V / f (ωx), f (ωy )) g M (A V ωx, ψy ). By considering the fibers as totally geodesic, we derive the formula. Conversely, it can be directly verified. Theorem 9. Let (M, ϕ, ξ, η, g M ) be a Kenmotsu manifold (N, g N ) be a Riemannian manifold. Let f : (M, ϕ, ξ, η, g M ) (N, g N ) be a pointwise slant submersion with non-zero slant function θ, then f is totally geodesic map if only if g N ( N V f (ωx), f (ωy )) = g M ([X, V ], Y ) sin 2 θ + V (θ)g M (X, Y ) sin 2θ + g M (A V ωψx, Y ) g M (A V ωx, ψy ), g M (A V ωx, BW ) = g N ( f V f (ωψx), f (W )) g N ( f V f (ωx), f (CW )) η(w )g M (BV, ψx), for any X, Y Γ(ker f ) V, W Γ(ker f ), where V V are f related vector fields f is the pullback connection along f. Proof. By definition, it follows that f is totally geodesic if only if ( f )(X, Y ) = 0, for any X, Y Γ(T M). From Theorem 3, we obtain the first equation. On the other h, for X, Y Γ(ker f ) V, W Γ(ker f ), using equations (2.2), (2.3), (2.4), (2.10), (2.11), (3.1), (3.2), (2.14), Theorem 6, we obtain g N (( f )(V, X), f (W )) sin 2 θ = g N ( f V f (ωx), f (W )) + g N ( f V f (ωx), f (CW )) + g M (A V ωx, BW ) + η(w )g M (BV, ψx). Conversely, it can be easily proved. References [1] P. Alegre, Slant submanifolds of Lorentzian Sasakian para Sasakian manifolds, Taiwanese J. Math., 17(3) (2013), [2] M. Atceken, Slant submanifolds of a Riemannian product manifold, Acta Math. Sci., 30 B (1) ( 2010),
11 POINTWISE SLANT SUBMERSIONS [3] M. Bagher, Point-wise slant submanifolds in almost contact geometry, Turk. J. Math., 40 (2016), [4] P. Baird J. C. Wood, Harmonic Morphisms Between Riemannian Manifolds, London Mathematical Society Monographs, 29, Oxford University Press, The Clarendon Press, Oxford, [5] D. E. Blair, Riemannian geometry of contact symplectic manifolds, Progress in Mathematics. 203, Birkhauser Boston, Basel, Berlin. (2002). [6] J. P. Bourguignon H. B. Lawson, Stability isolation phenomena for Yang-mills fields, Comm. Math. Phys., 79 (1981), [7] J. P. Bourguignon H. B. Lawson, A Mathematician s visit to Kaluza- Klein theory, Rend. Semin. Mat. Torino Fasc. Spec., (1989), [8] J. L. Cabrerizo, A. Carriazo M. Fernez, Slant submanifolds in Sasakian manifolds, Glasg. Math. J. 42, no. 1, (2000), [9] B. Y. Chen O. Garay, Pointwise slant submanifolds in almost Hermitian manifolds, Turk. J. Math., 36 (2012), [10] B. Y. Chen, Geometry of Slant Submanifolds, Katholieke Universiteit Leuven, Leuven, [11] C. Chinea, Almost contact metric submersions, Rend. Circ. Mat. Palermo, 43 no. 1, (1985), [12] F. Etayo, On quasi-slant submanifolds of an almost Hermitian manifold, Publ. Math. Debrecen, 53, no. 1-2, (1998), [13] M. Falcitelli, S. Ianus, A. M. Pastore, Riemannian Submersions Related Topics, World Scientific, River Edge, NJ, [14] A. Gray, Pseudo-Riemannian almost product manifolds submersion, J. Math. Mech., 16 (1967), [15] S. Ianus, A. M. Ionescu, R. Mocanu, G. E. Vilcu, Riemannian submersions from almost contact metric manifolds, Abh. Math. Semin. Univ. Hambg., 81, no. 1, (2011), [16] S. Ianus M. Visinescu, Kaluza-Klein theory with scalar fields generalized Hopf manifolds, Class. Quantum Gravity, 4 (1987), [17] JW. Lee B. Sahin, Pointwise Slant Submersions, Bull. Korean Math. Soc., 51 (2014), [18] A. Lotta, Slant submanifolds in contact geometry, Bull. Math. Soc. Sci. Math. Roum., Nouv. S er., 39 (1996),
12 SUSHIL KUMAR, AMIT KUMAR RAI, RAJENDRA PRASAD 572 [19] B. O Neill, The fundamental equations of a submersions, Mich Math J., 13 (1966), [20] B. Sahin, Slant submersions from almost Hermitian manifolds, Bull Math Soc. Sci. Math Roumanie, 54 (2011), [21] S. A. Sepet M. Ergut, Pointwise slant submersions from cosymplectic manifolds, Turk. J. Math., 40 (2016), [22] B. Watson, Almost Hermitian submersions, J. Differential Geom., 11 (1976), [23] B. Watson, G. G / -Riemannian submersions nonlinear gauge field equations of general relativity, In Rassias, T. (ed.) Global Analysis - Analysis on manifolds. dedicated M. Morse, Teubner-Texte Math., 57 (1983), Accepted:
Conformal anti-invariant Submersions from Sasakian manifolds
Global Journal of Pure and Applied Mathematics. ISSN 0973-1768 Volume 13, Number 7 (2017), pp. 3577 3600 Research India Publications http://www.ripublication.com/gjpam.htm Conformal anti-invariant Submersions
More informationWarped Product Bi-Slant Submanifolds of Cosymplectic Manifolds
Filomat 31:16 (2017) 5065 5071 https://doi.org/10.2298/fil1716065a Published by Faculty of Sciences and Mathematics University of Niš Serbia Available at: http://www.pmf.ni.ac.rs/filomat Warped Product
More informationarxiv:math/ v2 [math.dg] 25 May 2007
arxiv:math/0604008v2 [math.dg] 25 May 2007 A Note on Doubly Warped Product Contact CR-Submanifolds in trans-sasakian Manifolds Marian-Ioan Munteanu Abstract Warped product CR-submanifolds in Kählerian
More informationSCREEN TRANSVERSAL LIGHTLIKE SUBMANIFOLDS OF INDEFINITE KENMOTSU MANIFOLDS
SARAJEVO JOURNAL OF MATHEMATICS Vol.7 (19) (2011), 103 113 SCREEN TRANSVERSAL LIGHTLIKE SUBMANIFOLDS OF INDEFINITE KENMOTSU MANIFOLDS RAM SHANKAR GUPTA AND A. SHARFUDDIN Abstract. In this paper, we introduce
More informationOn the 5-dimensional Sasaki-Einstein manifold
Proceedings of The Fourteenth International Workshop on Diff. Geom. 14(2010) 171-175 On the 5-dimensional Sasaki-Einstein manifold Byung Hak Kim Department of Applied Mathematics, Kyung Hee University,
More informationA CHARACTERIZATION OF WARPED PRODUCT PSEUDO-SLANT SUBMANIFOLDS IN NEARLY COSYMPLECTIC MANIFOLDS
Journal of Mathematical Sciences: Advances and Applications Volume 46, 017, Pages 1-15 Available at http://scientificadvances.co.in DOI: http://dx.doi.org/10.1864/jmsaa_71001188 A CHARACTERIATION OF WARPED
More informationAn Inequality for Warped Product Semi-Invariant Submanifolds of a Normal Paracontact Metric Manifold
Filomat 31:19 (2017), 6233 620 https://doi.org/10.2298/fil1719233a Published by Faculty of Sciences Mathematics, University of Niš, Serbia Available at: http://www.pmf.ni.ac.rs/filomat An Inequality for
More informationK. A. Khan, V. A. Khan and Sirajuddin. Abstract. B.Y. Chen [4] showed that there exists no proper warped CRsubmanifolds
Faculty of Sciences and Mathematics, University of Niš, Serbia Available at: http://www.pmf.ni.ac.yu/filomat Filomat 21:2 (2007), 55 62 WARPED PRODUCT CONTACT CR-SUBMANIFOLDS OF TRANS-SASAKIAN MANIFOLDS
More informationComplex and real hypersurfaces of locally conformal Kähler manifolds
Complex and real hypersurfaces of locally conformal Kähler manifolds Odessa National Economic University Varna 2016 Topics 1 Preliminaries 2 Complex surfaces of LCK-manifolds 3 Real surfaces of LCK-manifolds
More informationJeong-Sik Kim, Yeong-Moo Song and Mukut Mani Tripathi
Bull. Korean Math. Soc. 40 (003), No. 3, pp. 411 43 B.-Y. CHEN INEQUALITIES FOR SUBMANIFOLDS IN GENERALIZED COMPLEX SPACE FORMS Jeong-Sik Kim, Yeong-Moo Song and Mukut Mani Tripathi Abstract. Some B.-Y.
More informationSome Properties of a Semi-symmetric Non-metric Connection on a Sasakian Manifold
Int. J. Contemp. Math. Sciences, Vol. 8, 2013, no. 16, 789-799 HIKARI Ltd, www.m-hikari.com http://dx.doi.org/10.12988/ijcms.2013.28172 Some Properties of a Semi-symmetric Non-metric Connection on a Sasakian
More informationON SEMI-INVARIANT SUBMANIFOLDS OF A NEARLY KENMOTSU MANIFOLD WITH THE CANONICAL SEMI-SYMMETRIC SEMI-METRIC CONNECTION. Mobin Ahmad. 1.
MATEMATIQKI VESNIK 62, 3 (2010), 189 198 September 2010 originalni nauqni rad research paper ON SEMI-INVARIANT SUBMANIFOLDS OF A NEARLY KENMOTSU MANIFOLD WITH THE CANONICAL SEMI-SYMMETRIC SEMI-METRIC CONNECTION
More informationAn inequality for warped product pseudo-slant submanifolds of nearly cosymplectic manifolds
Al-Solamy Journal of Inequalities and Applications (2015) 2015:306 DOI 10.1186/s13660-015-0825-y R E S E A R C H Open Access An inequality for warped product pseudo-slant submanifolds of nearly cosymplectic
More informationNEW EXAMPLES OF GENERALIZED SASAKIAN-SPACE-FORMS
Geom. Struc. on Riem. Man.-Bari Vol. 73/1, 3 4 (2015), 63 76 A. Carriazo 1 - P. Alegre 1 - C. Özgür - S. Sular NEW EXAMPLES OF GENERALIZED SASAKIAN-SPACE-FORMS Abstract. In this paper we study when a non-anti-invariant
More informationHARMONIC MAPS AND PARA-SASAKIAN GEOMETRY. S. K. Srivastava and K. Srivastava. 1. Introduction
MATEMATIČKI VESNIK MATEMATIQKI VESNIK 69, 3 2017, 153 163 September 2017 research paper originalni nauqni rad HARMONIC MAPS AND PARA-SASAKIAN GEOMETRY S. K. Srivastava and K. Srivastava Abstract. The purpose
More informationC-parallel Mean Curvature Vector Fields along Slant Curves in Sasakian 3-manifolds
KYUNGPOOK Math. J. 52(2012), 49-59 http://dx.doi.org/10.5666/kmj.2012.52.1.49 C-parallel Mean Curvature Vector Fields along Slant Curves in Sasakian 3-manifolds Ji-Eun Lee Institute of Mathematical Sciences,
More informationAbstract. In this study we consider ϕ conformally flat, ϕ conharmonically. 1. Preliminaries
RADOVI MATEMATIČKI Vol. 12 (2003), 99 106 ϕ conformally flat Lorentzian para Sasakian manifolds (Turkey) Abstract. In this study we consider ϕ conformally flat, ϕ conharmonically flat and ϕ projectively
More informationResearch Article Some Results on Warped Product Submanifolds of a Sasakian Manifold
International Mathematics and Mathematical Sciences Volume 2010, Article ID 743074, 9 pages doi:10.1155/2010/743074 Research Article Some Results on Warped Product Submanifolds of a Sasakian Manifold Siraj
More informationDoubly Warped Products in Locally Conformal Almost Cosymplectic Manifolds
INTERNATIONAL ELECTRONIC JOURNAL OF GEOMETRY VOLUME 0 NO. 2 PAGE 73 8 207) Doubly Warped Products in Locally Conformal Almost Cosymplectic Manifolds Andreea Olteanu Communicated by Ion Miai) ABSTRACT Recently,
More informationLegendre surfaces whose mean curvature vectors are eigenvectors of the Laplace operator
Note di Matematica 22, n. 1, 2003, 9 58. Legendre surfaces whose mean curvature vectors are eigenvectors of the Laplace operator Tooru Sasahara Department of Mathematics, Hokkaido University, Sapporo 060-0810,
More informationReal hypersurfaces in a complex projective space with pseudo- D-parallel structure Jacobi operator
Proceedings of The Thirteenth International Workshop on Diff. Geom. 13(2009) 213-220 Real hypersurfaces in a complex projective space with pseudo- D-parallel structure Jacobi operator Hyunjin Lee Department
More informationContact warped product semi-slant
Acta Univ. Sapientiae, Mathematica, 3, 2 (2011) 212 224 Contact warped product semi-slant submanifolds of (LCS) n -manifolds Shyamal Kumar Hui Nikhil Banga Sikshan Mahavidyalaya Bishnupur, Bankura 722
More informationON KENMOTSU MANIFOLDS
J. Korean Math. Soc. 42 (2005), No. 3, pp. 435 445 ON KENMOTSU MANIFOLDS Jae-Bok Jun, Uday Chand De, and Goutam Pathak Abstract. The purpose of this paper is to study a Kenmotsu manifold which is derived
More informationOptimal inequalities for the normalized δ-casorati curvatures of submanifolds in
Jae Won Lee, Chul Woo Lee, and Gabriel-Eduard Vîlcu* Optimal inequalities for the normalized δ-casorati curvatures of submanifolds in Kenmotsu space forms Abstract: In this paper, we establish two sharp
More informationCHAPTER 1 PRELIMINARIES
CHAPTER 1 PRELIMINARIES 1.1 Introduction The aim of this chapter is to give basic concepts, preliminary notions and some results which we shall use in the subsequent chapters of the thesis. 1.2 Differentiable
More informationSlant Submanifolds of a Conformal (k, µ)-contact Manifold
International J.Math. Combin. Vol.3(2017), 39-50 Slant Submanifolds of a Conformal (k, µ)-contact Manifold Siddesha M.S. (Department of mathematics, New Horizon College of Engineering, Bangalore, India)
More informationContact manifolds and generalized complex structures
Contact manifolds and generalized complex structures David Iglesias-Ponte and Aïssa Wade Department of Mathematics, The Pennsylvania State University University Park, PA 16802. e-mail: iglesias@math.psu.edu
More informationOn Indefinite Almost Paracontact Metric Manifold
International Mathematical Forum, Vol. 6, 2011, no. 22, 1071-1078 On Indefinite Almost Paracontact Metric Manifold K. P. Pandey Department of Applied Mathematics Madhav Proudyogiki Mahavidyalaya Bhopal,
More informationReal Hypersurfaces with Pseudo-parallel Normal Jacobi Operator in Complex Two-Plane Grassmannians
Filomat 31:12 (2017), 3917 3923 https://doi.org/10.2298/fil1712917d Published by Faculty of Sciences and Mathematics, University of Niš, Serbia Available at: http://www.pmf.ni.ac.rs/filomat Real Hypersurfaces
More informationIOSR Journal of Engineering (IOSRJEN) ISSN (e): , ISSN (p): Vol. 04, Issue 09 (September. 2014), V4 PP 32-37
IOSR Journal of Engineering (IOSRJEN) ISSN (e): 2250-3021, ISSN (p): 2278-8719 Vol. 04, Issue 09 (September. 2014), V4 PP 32-37 www.iosrjen.org A Quarter-Symmetric Non-Metric Connection In A Lorentzian
More informationON ϕ-pseudo SYMMETRIC KENMOTSU MANIFOLDS Shyamal Kumar Hui 1
Novi Sad J. Math. Vol. 43, No. 1, 2013, 89-98 ON ϕ-pseudo SYMMETRIC KENMOTSU MANIFOLDS Shyamal Kumar Hui 1 Abstract. The object of the present paper is to study ϕ-pseudo symmetric and ϕ-pseudo Ricci symmetric
More informationBulletin of the Malaysian Mathematical Sciences Society Warped product submanifolds of nearly cosymplectic manifolds with slant immersion
Bulletin of the Malaysian Mathematical Sciences Society Warped product submanifolds of nearly cosymplectic manifolds with slant immersion --Manuscript Draft-- Manuscript Number: Full Title: Article Type:
More informationGeneralized almost paracontact structures
DOI: 10.1515/auom-2015-0004 An. Şt. Univ. Ovidius Constanţa Vol. 23(1),2015, 53 64 Generalized almost paracontact structures Adara M. Blaga and Cristian Ida Abstract The notion of generalized almost paracontact
More informationSCREEN TRANSVERSAL LIGHTLIKE SUBMANIFOLDS OF INDEFINITE SASAKIAN MANIFOLDS
An. Şt. Univ. Ovidius Constanţa Vol. 18(2), 2010, 315 336 SCREEN TRANSVERSAL LIGHTLIKE SUBMANIFOLDS OF INDEFINITE SASAKIAN MANIFOLDS Cumali Yıldırım, Bayram Ṣahin Abstract We introduce screen transversal
More informationOn a Type of Para-Kenmotsu Manifold
Pure Mathematical Sciences, Vol. 2, 2013, no. 4, 165-170 HIKARI Ltd, www.m-hikari.com On a Type of Para-Kenmotsu Manifold T. Satyanarayana Department of Mathematics Pragati Engineering College, Surampalem,
More informationBulletin of the Transilvania University of Braşov Vol 6(55), No Series III: Mathematics, Informatics, Physics, 9-22
Bulletin of the Transilvania University of Braşov Vol 6(55), No. 1-013 Series III: Mathematics, Informatics, Physics, 9- CONHARMONIC CURVATURE TENSOR ON KENMOTSU MANIFOLDS Krishnendu DE 1 and Uday Chand
More informationThe Schouten-van Kampen affine connections adapted to almost (para)contact metric structures (the work in progress) Zbigniew Olszak
The Schouten-van Kampen affine connections adapted to almost (para)contact metric structures (the work in progress) Zbigniew Olszak Wroc law University of Technology, Wroc law, Poland XVII Geometrical
More informationConservative Projective Curvature Tensor On Trans-sasakian Manifolds With Respect To Semi-symmetric Metric Connection
An. Şt. Univ. Ovidius Constanţa Vol. 15(2), 2007, 5 18 Conservative Projective Curvature Tensor On Trans-sasakian Manifolds With Respect To Semi-symmetric Metric Connection C.S.Bagewadi, D.G.Prakasha and
More informationPseudoparallel Submanifolds of Kenmotsu Manifolds
Pseudoparallel Submanifolds of Kenmotsu Manifolds Sibel SULAR and Cihan ÖZGÜR Balıkesir University, Department of Mathematics, Balıkesir / TURKEY WORKSHOP ON CR and SASAKIAN GEOMETRY, 2009 LUXEMBOURG Contents
More informationWarped product submanifolds of Kaehler manifolds with a slant factor
ANNALES POLONICI MATHEMATICI 95.3 (2009) Warped product submanifolds of Kaehler manifolds with a slant factor by Bayram Sahin (Malatya) Abstract. Recently, we showed that there exist no warped product
More informationON AN EXTENDED CONTACT BOCHNER CURVATURE TENSOR ON CONTACT METRIC MANIFOLDS
C O L L O Q U I U M M A T H E M A T I C U M VOL. LXV 1993 FASC. 1 ON AN EXTENDED CONTACT BOCHNER CURVATURE TENSOR ON CONTACT METRIC MANIFOLDS BY HIROSHI E N D O (ICHIKAWA) 1. Introduction. On Sasakian
More informationLINEAR CONNECTIONS ON NORMAL ALMOST CONTACT MANIFOLDS WITH NORDEN METRIC 1
LINEAR CONNECTIONS ON NORMAL ALMOST CONTACT MANIFOLDS WITH NORDEN METRIC 1 Marta Teofilova Abstract. Families of linear connections are constructed on almost contact manifolds with Norden metric. An analogous
More informationReduction of Homogeneous Riemannian structures
Geometric Structures in Mathematical Physics, 2011 Reduction of Homogeneous Riemannian structures M. Castrillón López 1 Ignacio Luján 2 1 ICMAT (CSIC-UAM-UC3M-UCM) Universidad Complutense de Madrid 2 Universidad
More informationRicci solitons and gradient Ricci solitons in three-dimensional trans-sasakian manifolds
Filomat 26:2 (2012), 363 370 DOI 10.2298/FIL1202363T Published by Faculty of Sciences and Mathematics, University of Niš, Serbia Available at: http://www.pmf.ni.ac.rs/filomat Ricci solitons and gradient
More informationGeometrical study of real hypersurfaces with differentials of structure tensor field in a Nonflat complex space form 1
Global Journal of Pure and Applied Mathematics. ISSN 0973-1768 Volume 14, Number 9 (2018), pp. 1251 1257 Research India Publications http://www.ripublication.com/gjpam.htm Geometrical study of real hypersurfaces
More informationContact Metric Manifold Admitting Semi-Symmetric Metric Connection
International Journal of Mathematics Research. ISSN 0976-5840 Volume 6, Number 1 (2014), pp. 37-43 International Research Publication House http://www.irphouse.com Contact Metric Manifold Admitting Semi-Symmetric
More informationAlmost Kenmotsu 3-h-manifolds with cyclic-parallel Ricci tensor
Available online at www.tjnsa.com J. Nonlinear Sci. Appl. 9 (2016), 4206 4213 Research Article Almost Kenmotsu 3-h-manifolds with cyclic-parallel Ricci tensor Wenjie Wang Henan Engineering Laboratory for
More informationTHE TANAKA WEBSTER CONNECTION FOR ALMOST S-MANIFOLDS AND CARTAN GEOMETRY
ARCHIVUM MATHEMATICUM (BRNO) Tomus 40 (2004), 47 61 THE TANAKA WEBSTER CONNECTION FOR ALMOST S-MANIFOLDS AND CARTAN GEOMETRY ANTONIO LOTTA AND ANNA MARIA PASTORE Abstract. We prove that a CR-integrable
More informationReal Hypersurfaces in Complex Two-Plane Grassmannians with Vanishing Lie Derivative
Canad. Math. Bull. Vol. 49 (1), 2006 pp. 134 143 Real Hypersurfaces in Complex Two-Plane Grassmannians with Vanishing Lie Derivative Young Jin Suh Abstract. In this paper we give a characterization of
More information1. Introduction In the same way like the Ricci solitons generate self-similar solutions to Ricci flow
Kragujevac Journal of Mathematics Volume 4) 018), Pages 9 37. ON GRADIENT η-einstein SOLITONS A. M. BLAGA 1 Abstract. If the potential vector field of an η-einstein soliton is of gradient type, using Bochner
More informationDistributions of Codimension 2 in Kenmotsu Geometry
Distributions of Codimension 2 in Kenmotsu Geometry Constantin Călin & Mircea Crasmareanu Bulletin of the Malaysian Mathematical Sciences Society ISSN 0126-6705 Bull. Malays. Math. Sci. Soc. DOI 10.1007/s40840-015-0173-6
More informationLet F be a foliation of dimension p and codimension q on a smooth manifold of dimension n.
Trends in Mathematics Information Center for Mathematical Sciences Volume 5, Number 2,December 2002, Pages 59 64 VARIATIONAL PROPERTIES OF HARMONIC RIEMANNIAN FOLIATIONS KYOUNG HEE HAN AND HOBUM KIM Abstract.
More informationThe parallelism of shape operator related to the generalized Tanaka-Webster connection on real hypersurfaces in complex two-plane Grassmannians
Proceedings of The Fifteenth International Workshop on Diff. Geom. 15(2011) 183-196 The parallelism of shape operator related to the generalized Tanaka-Webster connection on real hypersurfaces in complex
More informationHard Lefschetz Theorem for Vaisman manifolds
Hard Lefschetz Theorem for Vaisman manifolds Antonio De Nicola CMUC, University of Coimbra, Portugal joint work with B. Cappelletti-Montano (Univ. Cagliari), J.C. Marrero (Univ. La Laguna) and I. Yudin
More informationSymmetries in Lightlike Hypersufaces of Indefinite Kenmotsu Manifolds
International Journal of Contemporary Mathematical Sciences Vol. 12, 2017, no. 3, 117-132 HIKARI Ltd, www.m-hikari.com https://doi.org/10.12988/ijcms.2017.611 Symmetries in Lightlike Hypersufaces of Indefinite
More informationAn isoparametric function on almost k-contact manifolds
An. Şt. Univ. Ovidius Constanţa Vol. 17(1), 2009, 15 22 An isoparametric function on almost k-contact manifolds Adara M. BLAGA Abstract The aim of this paper is to point out an isoparametric function on
More informationMEHMET AKIF AKYOL, LUIS M. FERNÁNDEZ, AND ALICIA PRIETO-MARTÍN
Konuralp Journal of Mathematics Volume No. 1 pp. 6 53 (016) c KJM THE L-SECTIONAL CURVATURE OF S-MANIFOLDS MEHMET AKIF AKYOL, LUIS M. FERNÁNDEZ, AND ALICIA PRIETO-MARTÍN Abstract. We investigate L-sectional
More informationclass # MATH 7711, AUTUMN 2017 M-W-F 3:00 p.m., BE 128 A DAY-BY-DAY LIST OF TOPICS
class # 34477 MATH 7711, AUTUMN 2017 M-W-F 3:00 p.m., BE 128 A DAY-BY-DAY LIST OF TOPICS [DG] stands for Differential Geometry at https://people.math.osu.edu/derdzinski.1/courses/851-852-notes.pdf [DFT]
More informationSYMPLECTIC MANIFOLDS, GEOMETRIC QUANTIZATION, AND UNITARY REPRESENTATIONS OF LIE GROUPS. 1. Introduction
SYMPLECTIC MANIFOLDS, GEOMETRIC QUANTIZATION, AND UNITARY REPRESENTATIONS OF LIE GROUPS CRAIG JACKSON 1. Introduction Generally speaking, geometric quantization is a scheme for associating Hilbert spaces
More information1. Geometry of the unit tangent bundle
1 1. Geometry of the unit tangent bundle The main reference for this section is [8]. In the following, we consider (M, g) an n-dimensional smooth manifold endowed with a Riemannian metric g. 1.1. Notations
More informationSUBTANGENT-LIKE STATISTICAL MANIFOLDS. 1. Introduction
SUBTANGENT-LIKE STATISTICAL MANIFOLDS A. M. BLAGA Abstract. Subtangent-like statistical manifolds are introduced and characterization theorems for them are given. The special case when the conjugate connections
More informationA Study on Ricci Solitons in Generalized Complex Space Form
E extracta mathematicae Vol. 31, Núm. 2, 227 233 (2016) A Study on Ricci Solitons in Generalized Complex Space Form M.M. Praveena, C.S. Bagewadi Department of Mathematics, Kuvempu University, Shankaraghatta
More informationON RANDERS SPACES OF CONSTANT CURVATURE
Vasile Alecsandri University of Bacău Faculty of Sciences Scientific Studies and Research Series Mathematics and Informatics Vol. 25(2015), No. 1, 181-190 ON RANDERS SPACES OF CONSTANT CURVATURE H. G.
More information(COMMUNICATED BY U.C. DE)
Bulletin of Mathematical Analysis and Applications ISSN: 181-191, URL: http://www.bmathaa.org Volume 6 Issue 3(014), Pages 79-87. THREE DIMENSIONAL LORENTZIAN PARA α-sasakian MANIFOLDS (COMMUNICATED BY
More informationGradient Ricci Soliton in Kenmotsu Manifold
IOSR Journal of Mathematics (IOSR-JM) e-issn: 2278-5728, p-issn: 2319-765X. Volume 10, Issue 5 Ver. I (Sep-Oct. 2014), PP 32-36 Gradient Ricci Soliton in Kenmotsu Manifold Nirabhra Basu* and Arindam Bhattacharyya**
More informationON THE GEOMETRY OF CONFORMAL FOLIATIONS WITH MINIMAL LEAVES
ON THE GEOMETRY OF CONFORMAL FOLIATIONS WITH MINIMAL LEAVES JOE OLIVER Master s thesis 015:E39 Faculty of Science Centre for Mathematical Sciences Mathematics CENTRUM SCIENTIARUM MATHEMATICARUM Abstract
More informationAPPROXIMATE YANG MILLS HIGGS METRICS ON FLAT HIGGS BUNDLES OVER AN AFFINE MANIFOLD. 1. Introduction
APPROXIMATE YANG MILLS HIGGS METRICS ON FLAT HIGGS BUNDLES OVER AN AFFINE MANIFOLD INDRANIL BISWAS, JOHN LOFTIN, AND MATTHIAS STEMMLER Abstract. Given a flat Higgs vector bundle (E,, ϕ) over a compact
More informationSome results on K-contact and Trans-Sasakian Manifolds
EUROPEAN JOURNAL OF PURE AND APPLIED MATHEMATICS Vol. 1, No., 008, (1-31) ISSN 1307-5543 www.ejpam.com Some results on K-contact and Trans-Sasakian Manifolds Bagewadi Channabasappa 1,, Basavarajappa N.S,
More informationOn φ-pseudo symmetric Kenmotsu manifolds with respect to quarter-symmetric metric connection
On φ-pseudo symmetric Kenmotsu manifolds with respect to quarter-symmetric metric connection Shyamal Kumar Hui Abstract. The object of the present paper is to study φ-pseudo symmetric and φ-pseudo Ricci
More informationConformal foliations and CR geometry
Geometry and Analysis, Flinders University, Adelaide p. 1/16 Conformal foliations and CR geometry Michael Eastwood [joint work with Paul Baird] University of Adelaide Geometry and Analysis, Flinders University,
More informationSYMPLECTIC GEOMETRY: LECTURE 5
SYMPLECTIC GEOMETRY: LECTURE 5 LIAT KESSLER Let (M, ω) be a connected compact symplectic manifold, T a torus, T M M a Hamiltonian action of T on M, and Φ: M t the assoaciated moment map. Theorem 0.1 (The
More informationA LIOUVIIE-TYPE THEOREMS FOR SOME CLASSES OF COMPLETE RIEMANNIAN ALMOST PRODUCT MANIFOLDS AND FOR SPECIAL MAPPINGS OF COMPLETE RIEMANNIAN MANIFOLDS
A LIOUIIE-TYPE TEOREMS FOR SOME CLASSES OF COMPLETE RIEMANNIAN ALMOST PRODUCT MANIFOLDS AND FOR SPECIAL MAPPINGS OF COMPLETE RIEMANNIAN MANIFOLDS SERGEY STEPANO Abstract. In the present paper we prove
More informationarxiv: v1 [math.dg] 4 Mar 2016
Hemi-slant submanifolds of nearly Kaehler manifolds Mehraj Ahmad Lone a,, Mohammad Hasan Shahid b a Department of Mathematics, Central University of Jammu, Jammu, 180011, India. b Department of Mathematics,
More informationConformal foliations and CR geometry
Twistors, Geometry, and Physics, celebrating the 80th birthday of Sir Roger Penrose, at the Mathematical Institute, Oxford p. 1/16 Conformal foliations and CR geometry Michael Eastwood [joint work with
More informationA Joint Adventure in Sasakian and Kähler Geometry
A Joint Adventure in Sasakian and Kähler Geometry Charles Boyer and Christina Tønnesen-Friedman Geometry Seminar, University of Bath March, 2015 2 Kähler Geometry Let N be a smooth compact manifold of
More informationConformal Killing forms on Riemannian manifolds
Conformal Killing forms on Riemannian manifolds Habilitationsschrift zur Feststellung der Lehrbefähigung für das Fachgebiet Mathematik in der Fakultät für Mathematik und Informatik der Ludwig-Maximilians-Universität
More informationGENERALIZED NULL SCROLLS IN THE n-dimensional LORENTZIAN SPACE. 1. Introduction
ACTA MATHEMATICA VIETNAMICA 205 Volume 29, Number 2, 2004, pp. 205-216 GENERALIZED NULL SCROLLS IN THE n-dimensional LORENTZIAN SPACE HANDAN BALGETIR AND MAHMUT ERGÜT Abstract. In this paper, we define
More informationRiemannian submersions and eigenforms of the Witten Laplacian
Proceedings of The Sixteenth International Workshop on Diff. Geom. 16(2012) 143-153 Riemannian submersions and eigenforms of the Witten Laplacian Hyunsuk Kang Department of Mathematics, Korea Institute
More informationDifferential Geometry MTG 6257 Spring 2018 Problem Set 4 Due-date: Wednesday, 4/25/18
Differential Geometry MTG 6257 Spring 2018 Problem Set 4 Due-date: Wednesday, 4/25/18 Required problems (to be handed in): 2bc, 3, 5c, 5d(i). In doing any of these problems, you may assume the results
More informationSome aspects of the Geodesic flow
Some aspects of the Geodesic flow Pablo C. Abstract This is a presentation for Yael s course on Symplectic Geometry. We discuss here the context in which the geodesic flow can be understood using techniques
More informationHarmonicity and spectral theory on Sasakian manifolds
Harmonicity and spectral theory on Sasakian manifolds Cătălin Gherghe Abstract We study in this paper harmonic maps and harmonic morphism on Sasakian manifolds. We also give some results on the spectral
More informationParallel and Killing Spinors on Spin c Manifolds. 1 Introduction. Andrei Moroianu 1
Parallel and Killing Spinors on Spin c Manifolds Andrei Moroianu Institut für reine Mathematik, Ziegelstr. 3a, 0099 Berlin, Germany E-mail: moroianu@mathematik.hu-berlin.de Abstract: We describe all simply
More informationη = (e 1 (e 2 φ)) # = e 3
Research Statement My research interests lie in differential geometry and geometric analysis. My work has concentrated according to two themes. The first is the study of submanifolds of spaces with riemannian
More informationRelativistic simultaneity and causality
Relativistic simultaneity and causality V. J. Bolós 1,, V. Liern 2, J. Olivert 3 1 Dpto. Matemática Aplicada, Facultad de Matemáticas, Universidad de Valencia. C/ Dr. Moliner 50. 46100, Burjassot Valencia),
More informationTHE VORTEX EQUATION ON AFFINE MANIFOLDS. 1. Introduction
THE VORTEX EQUATION ON AFFINE MANIFOLDS INDRANIL BISWAS, JOHN LOFTIN, AND MATTHIAS STEMMLER Abstract. Let M be a compact connected special affine manifold equipped with an affine Gauduchon metric. We show
More informationMath 868 Final Exam. Part 1. Complete 5 of the following 7 sentences to make a precise definition (5 points each). Y (φ t ) Y lim
SOLUTIONS Dec 13, 218 Math 868 Final Exam In this exam, all manifolds, maps, vector fields, etc. are smooth. Part 1. Complete 5 of the following 7 sentences to make a precise definition (5 points each).
More informationREAL HYPERSURFACES IN COMPLEX TWO-PLANE GRASSMANNIANS WHOSE SHAPE OPERATOR IS OF CODAZZI TYPE IN GENERALIZED TANAKA-WEBSTER CONNECTION
Bull. Korean Math. Soc. 52 (2015), No. 1, pp. 57 68 http://dx.doi.org/10.4134/bkms.2015.52.1.057 REAL HYPERSURFACES IN COMPLEX TWO-PLANE GRASSMANNIANS WHOSE SHAPE OPERATOR IS OF CODAZZI TYPE IN GENERALIZED
More informationANA IRINA NISTOR. Dedicated to the memory of Academician Professor Mileva Prvanović
Kragujevac Journal of Mathematics Volume 43(2) (2019), Pages 247 257. NEW EXAMPLES OF F -PLANAR CURVES IN 3-DIMENSIONAL WARPED PRODUCT MANIFOLDS ANA IRINA NISTOR Dedicated to the memory of Academician
More informationGENERALIZED WINTGEN INEQUALITY FOR BI-SLANT SUBMANIFOLDS IN LOCALLY CONFORMAL KAEHLER SPACE FORMS
MATEMATIČKI VESNIK MATEMATIQKI VESNIK 70, 3 (2018), 23 29 September 2018 research paper originalni nauqni rad GENERALIZED WINTGEN INEQUALITY FOR BI-SLANT SUBMANIFOLDS IN LOCALLY CONFORMAL KAEHLER SPACE
More informationARITHMETICITY OF TOTALLY GEODESIC LIE FOLIATIONS WITH LOCALLY SYMMETRIC LEAVES
ASIAN J. MATH. c 2008 International Press Vol. 12, No. 3, pp. 289 298, September 2008 002 ARITHMETICITY OF TOTALLY GEODESIC LIE FOLIATIONS WITH LOCALLY SYMMETRIC LEAVES RAUL QUIROGA-BARRANCO Abstract.
More informationarxiv: v2 [math.dg] 3 Sep 2014
HOLOMORPHIC HARMONIC MORPHISMS FROM COSYMPLECTIC ALMOST HERMITIAN MANIFOLDS arxiv:1409.0091v2 [math.dg] 3 Sep 2014 SIGMUNDUR GUDMUNDSSON version 2.017-3 September 2014 Abstract. We study 4-dimensional
More informationClassifications of Special Curves in the Three-Dimensional Lie Group
International Journal of Mathematical Analysis Vol. 10, 2016, no. 11, 503-514 HIKARI Ltd, www.m-hikari.com http://dx.doi.org/10.12988/ijma.2016.6230 Classifications of Special Curves in the Three-Dimensional
More informationUniversität Regensburg Mathematik
Universität Regensburg Mathematik Harmonic spinors and local deformations of the metric Bernd Ammann, Mattias Dahl, and Emmanuel Humbert Preprint Nr. 03/2010 HARMONIC SPINORS AND LOCAL DEFORMATIONS OF
More informationA CONSTRUCTION OF TRANSVERSE SUBMANIFOLDS
UNIVERSITATIS IAGELLONICAE ACTA MATHEMATICA, FASCICULUS XLI 2003 A CONSTRUCTION OF TRANSVERSE SUBMANIFOLDS by J. Szenthe Abstract. In case of Riemannian manifolds isometric actions admitting submanifolds
More informationFrom holonomy reductions of Cartan geometries to geometric compactifications
From holonomy reductions of Cartan geometries to geometric compactifications 1 University of Vienna Faculty of Mathematics Berlin, November 11, 2016 1 supported by project P27072 N25 of the Austrian Science
More informationOn Einstein Nearly Kenmotsu Manifolds
International Journal of Mathematics Research. ISSN 0976-5840 Volume 8, Number 1 (2016), pp. 19-24 International Research Publication House http://www.irphouse.com On Einstein Nearly Kenmotsu Manifolds
More informationREGULAR TRIPLETS IN COMPACT SYMMETRIC SPACES
REGULAR TRIPLETS IN COMPACT SYMMETRIC SPACES MAKIKO SUMI TANAKA 1. Introduction This article is based on the collaboration with Tadashi Nagano. In the first part of this article we briefly review basic
More informationRICCI CURVATURE OF SUBMANIFOLDS IN SASAKIAN SPACE FORMS
J. Austral. Math. Soc. 72 (2002), 27 256 RICCI CURVATURE OF SUBMANIFOLDS IN SASAKIAN SPACE FORMS ION MIHAI (Received 5 June 2000; revised 19 February 2001) Communicated by K. Wysocki Abstract Recently,
More informationCoordinate Finite Type Rotational Surfaces in Euclidean Spaces
Filomat 28:10 (2014), 2131 2140 DOI 10.2298/FIL1410131B Published by Faculty of Sciences and Mathematics, University of Niš, Serbia Available at: http://www.pmf.ni.ac.rs/filomat Coordinate Finite Type
More informationResearch Article GCR-Lightlike Product of Indefinite Sasakian Manifolds
Advances in Mathematical Physics Volume 2011, Article ID 983069, 13 pages doi:10.1155/2011/983069 Research Article GCR-Lightlike Product of Indefinite Sasakian Manifolds Rakesh Kumar, 1 Varun Jain, 2 andr.k.nagaich
More information