The paper is a complete study of paracontact metric manifolds for which the Reeb vector field of the underlying contact structure satisfies a nullity condition (the condition (1.2), for …
CS Bagewadi, G Ingalahalli - Acta mathematica academiae …, 2012 - real.mtak.hu
We study Ricci solitons in Lorentzian α-Sasakian manifolds. It is shown that a symmetric parallel second order covariant tensor in a Lorentzian α-Sasakian manifold is a constant …
A Ghosh, DS Patra - International Journal of Geometric Methods in …, 2018 - World Scientific
We prove that if a Sasakian metric is a∗-Ricci Soliton, then it is either positive Sasakian, or null-Sasakian. Next, we prove that if a complete Sasakian metric is an almost gradient∗ …
C Calin, M Crasmareanu - Rev. Roumaine Math. Pures Appl, 2012 - math.uaic.ro
In 1923, Eisenhart [9] proved that if a positive definite Riemannian manifold (M, g) admits a second order parallel symmetric covariant tensor other than a constant multiple of the metric …
Y Wang - Mathematica Slovaca, 2017 - degruyter.com
Ricci solitons on 3-dimensional cosymplectic manifolds Skip to content Should you have institutional access? Here's how to get it ... De Gruyter € EUR - Euro £ GBP - Pound $ USD …
A Ghosh - Chaos, Solitons & Fractals, 2011 - Elsevier
Kenmotsu 3-metric as a Ricci soliton - ScienceDirect Skip to main contentSkip to article Elsevier logo Journals & Books Search RegisterSign in View PDF Download full issue …
Main interest of the present paper is to investigate the almost {\alpha}-cosymplectic manifolds for which the characteristic vector field of the almost {\alpha}-cosymplectic …
Y Wang - Mediterranean Journal of Mathematics, 2016 - Springer
Let M be a compact almost coKähler manifold. If the metric g of M is a Ricci soliton and the potential vector field is pointwise collinear with the Reeb vector field, then we prove that M is …
We show that if a compact K-contact metric is a gradient Ricci almost soliton, then it is isometric to a unit sphere S 2 n+ 1. Next, we prove that if the metric of a non-Sasakian (κ, μ) …