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In this paper we investigate a kind of generalized Ricci flow which possesses a gradient form. We study the monotonicity of the given function under the generalized Ricci flow and prove that the related system of partial differential…

Differential Geometry · Mathematics 2011-07-19 Chun-lei He , Sen Hu , De-Xing Kong , Kefeng Liu

We derive estimates relating the values of a solution at any two points to the distance between the points, for quasilinear parabolic equations on compact Riemannian manifolds under the Ricci flow.

Differential Geometry · Mathematics 2020-01-07 Min Chen

In this paper, we continue to study the generalized Ricci flow. We give a criterion on steady gradient Ricci soliton on complete and noncompact Riemannian manifolds that is Ricci-flat, and then introduce a natural flow whose stable points…

Differential Geometry · Mathematics 2013-10-01 Yi Li

We prove the uniqueness of solutions of the Ricci flow on complete noncompact manifolds with bounded curvatures using the De Turck approach. As a consequence we obtain a correct proof of the existence of solution of the Ricci harmonic flow…

Differential Geometry · Mathematics 2011-10-10 Shu-Yu Hsu

This paper studies the normalized Ricci flow on surfaces with conical singularities. It's proved that the normalized Ricci flow has a solution for a short time for initial metrics with conical singularities. Moreover, the solution makes…

Differential Geometry · Mathematics 2015-12-08 Hao Yin

We investigate asymptotically flat manifolds with cone structure at infinity. We show that any such manifold M has a finite number of ends. For simply connected ends we classify all possible cones at infinity, except for the 4-dimensional…

Differential Geometry · Mathematics 2016-07-22 Anton Petrunin , Wilderich Tuschmann

In this paper, we prove a pseudolocality-type theorem for $\mathcal L$-complete noncompact Ricci flow which may not have bounded sectional curvature; with the help of it we study the uniqueness of the Ricci flow on noncompact manifolds. In…

Differential Geometry · Mathematics 2022-12-13 Liang Cheng , Yongjia Zhang

We establish the short-time existence of the Ricci flow on surfaces with a finite number of conic points, all with cone angle between 0 and $2\pi$, where the cone angles remain fixed or change in some smooth prescribed way. For the…

Differential Geometry · Mathematics 2015-07-29 Rafe Mazzeo , Yanir A. Rubinstein , Natasa Sesum

This paper investigates the question of stability for a class of Ricci flows which start at possibly non-smooth metric spaces. We show that if the initial metric space is Reifenberg and locally bi-Lipschitz to Euclidean space, then two…

Differential Geometry · Mathematics 2025-03-18 Alix Deruelle , Felix Schulze , Miles Simon

We describe the Ricci flow on two classes of compact three-dimensional manifolds: 1. Warped products with a circle fiber over a two-dimensional base. 2. Manifolds with a free local isometric U(1) x U(1) action.

Differential Geometry · Mathematics 2011-10-10 John Lott , Natasa Sesum

We prove the existence of Ricci flow starting from a class of metrics with unbounded curvature, which are doubly-warped products over an interval with a spherical factor pinched off at an end. These provide a forward evolution from some…

Differential Geometry · Mathematics 2018-05-25 Timothy Carson

Given an asymptotically conical, shrinking, gradient Ricci soliton, we show that there exists a Ricci flow solution on a closed manifold that forms a finite-time singularity modeled on the given soliton. No symmetry or Kahler assumptions on…

Differential Geometry · Mathematics 2024-07-30 Maxwell Stolarski

In this paper, we establish a framework for the analysis of linear parabolic equations on conical surfaces and use them to study the conical Ricci flow. In particular, we prove the long time existence of the conical Ricci flow for general…

Analysis of PDEs · Mathematics 2016-05-31 Hao Yin

We construct smooth solutions to Ricci flow starting from a class of singular metrics and give asymptotics for the forward evolution. The singular metrics heal with a set of points (of codimension at least three) coming out of the singular…

Differential Geometry · Mathematics 2017-04-24 Timothy Carson

This paper investigates which smooth manifolds arise as quotients (orbit spaces) of flows of vector fields. Such quotient maps were already known to be surjective on fundamental groups, but this paper shows that every epimorphism of…

Dynamical Systems · Mathematics 2017-03-14 Robert E. Gompf

We classify and expose all the gradient Ricci solitons on complete surfaces, open or closed, with curvature bounded below, and possibly with a discrete set of cone-like singular points that arise naturally. We give a precise qualitative…

Differential Geometry · Mathematics 2013-04-24 Daniel Ramos

We study the long-time behavior of the Kahler-Ricci flow on compact Kahler manifolds. We give an almost complete classification of the singularity type of the flow at infinity, depending only on the underlying complex structure. If the…

Differential Geometry · Mathematics 2017-01-03 Valentino Tosatti , Yuguang Zhang

The examples of the Ricci flows on four-dimendionsl manifolds which are determined by help of nonlinear differentials equations of the type of Monge-Ampere are constructed. Their particular solutions and their properties are discussed.

General Physics · Physics 2011-11-17 Valerii Dryuma

In this paper we study the pseudolocality theorems of Ricci flows on incomplete manifolds. We prove that if a ball with its closure contained in an incomplete manifold has the small scalar curvature lower bound and almost Euclidean…

Differential Geometry · Mathematics 2023-08-30 Liang Cheng

At any point of a surface in the four-dimensional Euclidean space we consider the geometric configuration consisting of two figures: the tangent indicatrix, which is a conic in the tangent plane, and the normal curvature ellipse. We show…

Differential Geometry · Mathematics 2009-05-28 Georgi Ganchev , Velichka Milousheva