Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Shahroud Azami"'
Publikováno v:
Journal of Inequalities and Applications, Vol 2024, Iss 1, Pp 1-16 (2024)
Abstract This article provides a Li–Yau-type gradient estimate for a semilinear weighted parabolic system of semilinear equations along an abstract geometric flow on a smooth measure space. A Harnack-type inequality on the system is also derived at
Externí odkaz:
https://doaj.org/article/087cfd3236c440fcbde092dbb1db8354
Autor:
Sakineh Hajiaghasi, Shahroud Azami
Publikováno v:
Journal of Mahani Mathematical Research, Vol 13, Iss 2, Pp 1-12 (2024)
The main purpose of the present paper is about characterizing the properties of the perfect fluid space-time that admits the gradient Ricci-Bourguignon soliton. This gives some results about the stability of the energy-momentum tensor and also under
Externí odkaz:
https://doaj.org/article/b82ad72d1a10472eb23e0d1d07b4f5d0
Autor:
Hamed Faraji, Shahroud Azami
Publikováno v:
AUT Journal of Mathematics and Computing, Vol 6, Iss 1, Pp 51-62 (2024)
In this paper, we will focus our attention on the structure of $h$-almost Ricci solitons on complex hyperbolic quadric. We will prove non-existence a contact real hypersurface in the complex hyperbolic quadric $Q^{m^*}, m\geq 3$, admitting the gradie
Externí odkaz:
https://doaj.org/article/bbf74f89eacc469ab99cf44b50933e06
Publikováno v:
AIMS Mathematics, Vol 9, Iss 7, Pp 18929-18943 (2024)
In the present paper, we investigate perfect fluid spacetimes and perfect fluid generalized Roberston-Walker spacetimes that contain a torse-forming vector field satisfying almost hyperbolic Ricci solitons. We show that the perfect fluid spacetimes t
Externí odkaz:
https://doaj.org/article/02ecf0ff6a6249b6a8a461fea000584e
Publikováno v:
Mathematics Interdisciplinary Research, Vol 9, Iss 1, Pp 45-76 (2024)
Ricci bi-conformal vector fields have find their place in geometry as well as in physical applications. In this paper, we consider the Siklos spacetimes and we determine all the Ricci bi-conformal vector fields on these spaces.
Externí odkaz:
https://doaj.org/article/090cc52e1fdf46ab9a5b8f501640c977
Autor:
Sakineh Hajiaghasi, Shahroud Azami
Publikováno v:
Sahand Communications in Mathematical Analysis, Vol 21, Iss 1, Pp 83-98 (2024)
In this paper, we consider positive solutions for the Allen-Cahn equation\begin{equation*}\Delta u+\left(1-u^{2}\right)u=0,\end{equation*}on an almost Ricci soliton without a boundary. Firstly, using volume comparison Theorem and Sobolev inequality,
Externí odkaz:
https://doaj.org/article/039e1fa69a7a45c8bd4e915f2649e000
Autor:
Shahroud Azami
Publikováno v:
AUT Journal of Mathematics and Computing, Vol 5, Iss 1, Pp 19-26 (2024)
In this paper, we investigate f-Kenmotsu 3-dimensional manifolds admitting generalized η-Ricci solitons with respect to the Schouten-van Kampen connection. We provide an example of generalized η-Ricci solitons with respect to the Schouten-van Kampe
Externí odkaz:
https://doaj.org/article/6b5e4b5567404c239f3d080b844c404a
Autor:
Shahroud Azami
Publikováno v:
Journal of Mahani Mathematical Research, Vol 13, Iss 1, Pp 159-165 (2023)
In this paper, we investigate the normalized Ricci-Bourguignon flow with incomplete initial metric on an open surface. We show that such a flow converges exponentially to a metric with constant Gaussian curvature if the initial metric is suitable. In
Externí odkaz:
https://doaj.org/article/f7a24bb0be134cb69be8da42e00274de
Publikováno v:
Axioms, Vol 13, Iss 4, p 211 (2024)
In this paper, we study left-invariant cross curvature solitons on Lorentzian three-dimensional Lie groups and classify these solitons.
Externí odkaz:
https://doaj.org/article/7a1c4be090df4bf1bfb110c4213d73b3
Publikováno v:
Arab Journal of Mathematical Sciences, Vol 29, Iss 1, Pp 52-62 (2023)
Purpose – In this paper, we consider the Heisenberg groups which play a crucial role in both geometry and theoretical physics. Design/methodology/approach – In the first part, we retrieve the geometry of left-invariant Randers metrics on the Heis
Externí odkaz:
https://doaj.org/article/25b21f5f8ccb4c27a66d4ae5de2121bf