Results 31 to 40 of about 34,283 (120)

Pair of Associated η-Ricci–Bourguignon Almost Solitons with Vertical Torse-Forming Potential on Almost Contact Complex Riemannian Manifolds

Mathematics
Each of the studied manifolds has a pair of B-metrics, interrelated by an almost contact structure. The case where each of these metrics gives rise to an η-Ricci–Bourguignon almost soliton, where η is the contact form, is studied.
Mancho Manev
doaj   +2 more sources

On Kaehlerian torse-forming vector fields [PDF]

Kodai Mathematical Journal, 1979
Seiichi Yamaguchi
openaire   +4 more sources

Certain Results on $N(k)-$Contact Metric Manifolds and Torse-Forming Vector Fields

, 2020
H. Yoldaş
semanticscholar   +3 more sources

Conformal η‐Ricci‐Yamabe Solitons within the Framework of ϵ‐LP‐Sasakian 3‐Manifolds

Advances in Mathematical Physics, Volume 2022, Issue 1, 2022., 2022
In the present note, we study ϵ‐LP‐Sasakian 3‐manifolds M3(ϵ) whose metrics are conformal η‐Ricci‐Yamabe solitons (in short, CERYS), and it is proven that if an M3(ϵ) with a constant scalar curvature admits a CERYS, then £Uζ is orthogonal to ζ if and only if Λ − ϵσ = −2ϵl + (mr/2) + (1/2)(p + (2/3)). Further, we study gradient CERYS in M3(ϵ) and proved
Abdul Haseeb, Meraj Ali Khan, Antonio Scarfone   +2 more
wiley   +1 more source

Investigation of Pseudo‐Ricci Symmetric Spacetimes in Gray’s Subspaces

Journal of Mathematics, Volume 2021, Issue 1, 2021., 2021
In the present paper, we focused our attention to study pseudo‐Ricci symmetric spacetimes in Gray’s decomposition subspaces. It is proved that (PRS)n spacetimes are Ricci flat in trivial, A, and B subspaces, whereas perfect fluid in subspaces I, I ⊕ A, and I ⊕ B, and have zero scalar curvature in subspace A ⊕ B.
Sameh Shenawy, Uday Chand De, Nasser Bin Turki, Suliman Alsaeed, Abdallah Abdelhameed Syied, Bibhas Ranjan Majhi   +5 more
wiley   +1 more source

Para-Ricci-Like Solitons on Riemannian Manifolds with Almost Paracontact Structure and Almost Paracomplex Structure

Mathematics, 2021
We introduce and study a new type of soliton with a potential Reeb vector field on Riemannian manifolds with an almost paracontact structure corresponding to an almost paracomplex structure.
Hristo Manev, Mancho Manev
doaj   +1 more source

Some properties of biconcircular gradient vector fields; pp. 162–169 [PDF]

Proceedings of the Estonian Academy of Sciences, 2009
We consider a Riemannian manifold carrying a biconcircular gradient vector field X, having as generative a closed torse forming U. The existence of such an X is determined by an exterior differential system in involution depending on two arbitrary ...
Adela Mihai
doaj   +1 more source

n-Ricci-Bourguignon solitons with a semi-symmetric metric and semi-symmetric non-metric connection

AIMS Mathematics, 2023
We consider a generalization of a Ricci soliton as $ \eta $-Ricci-Bourguignon solitons on a Riemannian manifold endowed with a semi-symmetric metric and semi-symmetric non-metric connection.
Yusuf Dogru
doaj   +1 more source

Geometry of almost contact metrics as a *-conformal Ricci-Yamabe solitons and related results [PDF]

, 2023
The goal of this paper is to study certain types of metric such as *-conformal Ricci-Yamabe soliton (RYS), whose potential vector field is torse-forming on Kenmotsu manifold.
Dey, Santu, Karaca, Fatma, Roy, Soumendu
core   +1 more source

A note on Concircular Structure space-times [PDF]

, 2018
In this note we show that Lorentzian Concircular Structure manifolds (LCS)_n coincide with Generalized Robertson-Walker space-times.Comment: 2 ...
Mantica, Carlo Alberto, Molinari, Luca Guido   +1 more
core   +3 more sources