In this paper, contact metric manifolds whose characteristic vector field ξ is a harmonic vector
field are called H-contact manifolds. We show that a (2n+ 1)-dimensional contact metric …

We introduce a systematic study of contact structures with pseudo-Riemannian associated
metrics, emphasizing analogies and differences with respect to the Riemannian case. In …

We introduce and study $ H $-paracontact metric manifolds, that is, paracontact metric
manifolds whose Reeb vector field $\xi $ is harmonic. We prove that they are characterized …

There is one-to-one correspondence between contact semi-Riemannian structures (η, ξ, φ,
g) and non-degenerate almost CR structures (H, ϑ, J). In general, a non-degenerate almost …

A contact metric manifold whose characteristic vector field is a harmonic vector field is called
an H-contact metric manifold. We introduce the notion of (κ, μ, ν)-contact metric manifolds in …

This paper is a study of three-dimensional paracontact metric (\k {appa},{\mu},{\nu})-
manifolds. Three dimensional paracontact metric manifolds whose Reeb vector field {\xi} is …

Let (M, g) be a Riemannian manifold. When M is compact and the tangent bundle TM is
equipped with the Sasaki metric gs, the only vector fields that define harmonic maps from (M …

We characterize H-contact semi-Riemannian manifolds (ie, contact semi-Riemannian
manifolds whose Reeb vector field ξ is harmonic) by the condition that ξ is a Ricci …

Let (M, g) be a compact Riemannian manifold and T1M its unit tangent sphere bundle. Unit
vector fields defining harmonic maps from (M, g) to (T1M, g˜ s), g˜ s being the Sasaki metric …

We investigate almost contact metric manifolds whose Reeb vector field is a harmonic unit
vector field, equivalently a harmonic section. We first consider an arbitrary Riemannian …