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In this survey paper, we analyse and compare the recent curvature estimates for three types of $4$-dimensional gradient Ricci solitons, especially between Ricci shrinkers [58] and expanders [17]. In addition, we provide some new curvature…

Differential Geometry · Mathematics 2025-10-08 Huai-Dong Cao

Suppose $(M, g, f)$ is a 5-dimensional complete shrinking gradient Ricci soliton with $R=1$. If it has bounded curvature, we prove that it is a finite quotient of $\mathbb{R}^3\times \mathbb{S}^2$.

Differential Geometry · Mathematics 2025-06-03 Fengjiang Li , Jianyu Ou , Yuanyuan Qu , Guoqiang Wu

We study integral and pointwise bounds on the curvature of gradient shrinking Ricci solitons. As applications we discuss gap and compactness results for gradient shrinkers.

Differential Geometry · Mathematics 2010-06-18 Ovidiu Munteanu , Mu-Tao Wang

We classify complete gradient Ricci solitons satisfying a fourth-order vanishing condition on the Weyl tensor, improving previously known results. More precisely, we show that any $n$-dimensional ($n\geq 4$) gradient shrinking Ricci soliton…

Differential Geometry · Mathematics 2017-10-06 Giovanni Catino , Paolo Mastrolia , Dario Daniele Monticelli

In this article, we study four-dimensional complete gradient shrinking Ricci solitons. We prove that a four-dimensional complete gradient shrinking Ricci soliton satisfying a pointwise condition involving either the self-dual or…

Differential Geometry · Mathematics 2024-03-12 Huai-Dong Cao , Ernani Ribeiro , Detang Zhou

In this paper, we will prove a gap theorem for four-dimensional gradient shrinking soliton. More precisely, we will show that any complete four-dimensional gradient shrinking soliton with nonnegative and bounded Ricci curvature, satisfying…

Differential Geometry · Mathematics 2016-08-30 Zhuhong Zhang

We study stability of non-compact gradient Kaehler-Ricci flow solitons with positive holomorphic bisectional curvature. Our main result is that any compactly supported perturbation and appropriately decaying perturbations of the Kaehler…

Differential Geometry · Mathematics 2007-05-23 Albert Chau , Oliver C. Schnuerer

We show that gradient shrinking, expanding or steady Ricci solitons have potentials leading to suitable reference probability measures on the manifold. For shrinking solitons, as well as expanding soltions with nonnegative Ricci curvature,…

Differential Geometry · Mathematics 2009-05-11 Jose Carrillo , Lei Ni

For complete shrinking (gradient) Ricci solitons, we observe a quantification of Wylie's result that the fundamental group is finite.

Differential Geometry · Mathematics 2015-06-19 Bennett Chow , Peng Lu

Let $(M, g, f)$ be a $4$-dimensional complete noncompact gradient shrinking Ricci soliton with the equation $Ric+\nabla^2f=\lambda g$, where $\lambda$ is a positive real number. We prove that if $M$ has constant scalar curvature…

Differential Geometry · Mathematics 2021-06-24 Xu Cheng , Detang Zhou

In this paper we prove that the Sobolev inequality, the logarithmic Sobolev inequality, the Schr\"odinger heat kernel upper bound, the Faber-Krahn inequality, the Nash inequality and the Rozenblum-Cwikel-Lieb inequality all equivalently…

Differential Geometry · Mathematics 2025-01-20 Jia-Yong Wu

In this article we have showed that a gradient $\rho$-Einstein soliton with a vector field of bounded norm and satisfying some other conditions is isometric to the Euclidean sphere. Later, we have proved that a non-trivial complete gradient…

Differential Geometry · Mathematics 2021-06-02 Absos Ali Shaikh , Antonio W. Cunha , Prosenjit Mandal

In this paper we study the gradient Ricci shrinking soliton equation on rotationally symmetric manifolds of dimension three and higher and prove that the only complete examples of such metrics on $S^n$, $\R{n}$ and $\R{}\times S^{n-1}$ are,…

Differential Geometry · Mathematics 2007-05-23 Brett Kotschwar

In this note, we prove a new uncertainty principle for functions with radial symmetry by differentiating a radial version of the Stein-Weiss inequality. The difficulty is to prove the differentiability in the limit of the best constant…

Functional Analysis · Mathematics 2025-08-13 Jacopo Bellazzini , Matteo Nesi

We first investigate the asymptotics of conical expanding gradient Ricci solitons by proving sharp decay rates to the asymptotic cone both in the generic and the asymptotically Ricci flat case. We then establish a compactness theorem…

Differential Geometry · Mathematics 2014-11-11 Alix Deruelle

We prove that the sharp Li-Yau equality holds for the conjugate heat kernel on shrinking Ricci solitons without any curvature or volume assumptions. This quantity yields several estimates which allows us to classify four dimensional,…

Differential Geometry · Mathematics 2020-09-22 Jason Ledwidge

We study deformations of shrinking Ricci solitons on a compact manifold M, generalising the classical theory of deformations of Einstein metrics. Using appropriate notions of twisted slices S_f inside the space of all Riemannian metrics on…

Differential Geometry · Mathematics 2013-02-19 Fabio Podesta' , Andrea Spiro

We prove that a shrinking gradient Ricci soliton which agrees to infinite order at spatial infinity with one of the standard cylindrical metrics on $S^k\times \RR^{n-k}$ for $k\geq 2$ along some end must be isometric to the cylinder on that…

Differential Geometry · Mathematics 2020-09-16 Brett Kotschwar , Lu Wang

In this paper we show how techniques coming from stochastic analysis, such as stochastic completeness (in the form of the weak maximum principle at infinity), parabolicity and $L^p$-Liouville type results for the weighted Laplacian…

Differential Geometry · Mathematics 2009-10-23 Stefano Pigola , Michele Rimoldi , Alberto G. Setti

In this paper we derive a Heisenberg-type uncertainty principle for the continuous Clifford wavelet transform. A brief review of Clifford algebra/analysis, wavelet transform on $\mathbb{R}$ and Clifford-Fourier transform and their…

Mathematical Physics · Physics 2019-05-27 Hicham Banouh , Anouar Ben Mabrouk , Mohamed Kesri