THE L-SECTIONAL CURVATURE OF S-MANIFOLDS
Year 2016,
Volume: 4 Issue: 1, 246 - 253, 01.04.2016
Mehmet Akif Akyol
Luis M. Fernandez,
,
Alicia Prıeto-martın
Abstract
We investigate L-sectional curvature of S-manifolds with respect to the Riemannian connection and to certain semi-symmetric metric and non- metric connections naturally related with the structure, obtaining conditions for them to be constant and giving examples of S-manifolds in such conditions. Moreover, we calculate the scalar curvature in all the cases.
References
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f3 + f = 0, Tensor, N. S., Vol:14 (1963), 99-109.
Year 2016,
Volume: 4 Issue: 1, 246 - 253, 01.04.2016
Mehmet Akif Akyol
Luis M. Fernandez,
,
Alicia Prıeto-martın
References
- [1] M. Akif Akyol, A. Turgut Vanli and L.M. Fernandez, Curvature properties
of a semi-symmetric metric connection dened on S-manifolds, Ann. Polonici
Math., Vol:107, No.1 (2013), 71-86.
- [2] M. Akif Akyol, A. Turgut Vanli and L.M. Fernandez, Semi-symmetry properties
of S-manifolds endowed with a semi-symmetric non metric connection, to
appear in An. Sti. Univ. \Al. I. Cuza" (Iasi) (2015).
- [3] D.E. Blair, Geometry of manifolds with structural group U(n)O(s), J. Dier.
Geom., Vol:4 (1970), 155-167.
- [4] D.E. Blair, On a generalization of the Hopf bration, An. Sti. Univ. \Al. I.
Cuza" (Iasi), Vol:17 (1971), 171-177.
- [5] D.E. Blair and G.D. Ludden, Hypersurfaces in almost contact manifolds,
T^ohoku Math. J., Vol:21 (1969), 354-362.
- [6] J.L. Cabrerizo, L.M. Fernandez and M. Fernandez, The curvature tensor elds
on f-manifolds with complemented frames, An. Sti. Univ. \Al. I. Cuza" (Iasi),
Vol:36 (1990), 151-161.
- [7] A. Friedmann and J.A. Schouten, Uber die Geometrie der halbsymmetrischen
Ubertragung, Math. Zeitschr., Vol:21 (1924), 211-223.
- [8] S.I. Goldberg and K.Yano, Globally framed f-manifolds, Illinois J. Math.,
Vol:15 (1971), 456-474.
- [9] S.I. Goldberg and K.Yano, On normal globally framed manifolds, T^ohoku
Math. J., Vol:22 (1970), 362-370.
- [10] I. Hasegawa, Y. Okuyama and T. Abe, On p-th Sasakian manifolds, J.
Hokkaido Univ. of Education (Section II A), Vol:37 (1986), 1-16.
- [11] H.A. Hayden, Subspaces of a space with torsion, Proc. London Math. Soc.,
Vol 34 (1932), 27-50.
- [12] M. Kobayashi and S. Tsuchiya, Invariant submanifolds of an f-manifold with
complemented frames, Kodai Math. Sem. Rep., Vol:24 (1972), 430-450.
- [13] K. Yano, On a structure dened by a tensor eld f of type (1,1) satisfying
f3 + f = 0, Tensor, N. S., Vol:14 (1963), 99-109.