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 …

We completely describe paracontact metric three-manifolds whose Reeb vector field
satisfies the Ricci soliton equation. While contact Riemannian (or Lorentzian) Ricci solitons …

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 …

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 …

In this paper, we show that if an integrable contact pseudo-metric manifold of dimension 2
n+ 1, n≥ 2, has constant sectional curvature κ κ, then the structure is Sasakian and κ= ε= g …

This paper is a study of three-dimensional paracontact metric (κ ̃, μ ̃, ν ̃)-manifolds. Three-
dimensional paracontact metric manifolds whose Reeb vector field ξ is harmonic are …

In this paper we characterize K-contact semi-Riemannian manifolds and Sasakian semi-
Riemannian manifolds in terms of curvature. Moreover, we show that any conformally flat K …

The purpose of this article is to investigate almost Ricci solitons on para-contact manifolds.
We demonstrate that a gradient almost Ricci soliton whose metric is para-sasakian turns into …

We study the geometry of almost contact pseudo-metric manifolds in terms of tensor fields
h:= 1 2\pounds _ ξ φ h:= 1 2£ ξ φ and ℓ:= R (⋅, ξ) ξ ℓ:= R (·, ξ) ξ, emphasizing analogies and …

The tangent bundle TM of a semi-Riemannian manifold (M, g) admits a natural indefinite
almost Kaehler structure (J, G) and the unit tangent hyperquadric bundle T_ ε (M, g) T ε (M …