Remarks on almost η-Ricci solitons in (ε)-para Sasakian manifolds
Remarks on almost η-Ricci solitons in (ε)-para Sasakian manifolds
We consider almost η-Ricci solitons in (ε)-para Sasakian manifolds satisfying certain curvature conditions. In the gradient case we give an estimation for the norm of the Ricci curvature tensor and express the scalar curvature of the manifold in terms of the two functions that define the soliton. We also prove that if the Ricci operator is of Codazzi type, then the gradient η-Ricci soliton is expanding if M is spacelike or shrinking if M is timelike.
Keywords:
Almost η-Ricci solitons, (ε)-para Sasakian structure,
___
- Acet, B. E., A note on Ricci solitons on para-Sasakian manifolds, J. Sci. Tech., 11, (2018), no. 2, 237--242.
- Blaga, A. M., Almost η-Ricci solitons in (LCS)_{n}-manifolds, to appear in Bull. Belg. Math. Soc. Simon Stevin, 25, (2018), no 5, 641--653
- Blaga, A. M., η-Ricci solitons on Lorentzian para-Sasakian manifolds, Filomat, 30, (2016), no. 2, 489--496.
- Blaga, A. M., Perktaş, S. Y., Acet, B. E., Erdoğan, F. E., η-Ricci solitons in (ε)-almost paracontact metric manifolds, Glasnik Matematicki, 53, (2018), no. 1, 377--410.
- Cho, J. T., Kimura, M., Ricci solitons and real hypersurfaces in a complex space form, Tôhoku Math. J., 61, (2009), no. 2, 205--212.
- Crasmareanu, M., A new approach to gradient Ricci solitons and generalizations, to appear in Filomat.
- Hamilton, R. S., Three-manifolds with positive Ricci curvature, J. Diff. Geom., 17, (1982), 255--306.
- Pigola, S., Rigoli, M., Rimoldi, M., Setti, A., Ricci almost solitons, Ann. Sc. Norm. Super. Pisa Cl. Sci., (5) 10, (2011), 757--799.
- Satō, I., On a structure similar to the almost contact structure, Tensor (N.S.), 30, (1976), no. 3, 219--224.
- Tripathi, M. M., Kılıç, E., Perktaş, S. Y., Keleş, S., Indefinite almost paracontact metric manifolds, Int. J. Math. Math. Sci., (2010), 846195, pp. 19.
- ISSN: 1303-5991
- Yayın Aralığı: Yılda 4 Sayı
- Başlangıç: 1948
- Yayıncı: Ankara Üniversitesi