The purpose of this paper is to prove a Hitchin–Thorpe inequality for a four-dimensional compact almost Ricci soliton. Moreover, we prove that under a suitable integral condition, a four-dimensional compact almost Ricci ...

We study the evolution of homogeneous Ricci solitons under the bracket flow, a dynamical system on the space Graphic of all homogeneous spaces of dimension n with a q-dimensional isotropy, which is equivalent to the Ricci ...

A teoria dos solitons de Ricci desempenha um papel fundamental no estudo dos fluxos de Ricci Hamiltonianos. Tal estudo serviu de base para a demonstração da Conjectura de Poincaré, problema que durou muitos anos na Matemática ...

In this article, we classify expanding homogeneous Ricci solitons up to dimension 5, according to their presentation as homogeneous spaces. We obtain that they are all isometric to solvsolitons, and this, in particular, ...

We bring new insights into the longstanding Alekseevskii conjecture, namely that any connected homogeneous Einstein manifold of negative scalar curvature is diffeomorphic to a Euclidean space, by proving structural results ...

This paper is concerned with Chern-Ricci flow evolution of left-invariant hermitian structures on Lie groups. We study the behavior of a solution, as t is approaching the first time singularity, by rescaling in order to ...

Baseado em [16] e [17], apresentamos nesta dissertação um estudo de classificação de quase solitons gradientes de Ricci e solitons gradientes de Yamabe. No primeiro caso, estudamos a classificação de quase solitons gradientes ...

We show how to associate with each graph with a certain property (positivity) a family of simply connected solvable Lie groups endowed with left-invariant Riemannian metrics that are Ricci solitons (called solvsolitons). ...