arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2004.14426math.DG
收藏

Ricci孤子和准Einstein流形的体积增长估计

Volume growth estimates for Ricci solitons and quasi-Einstein manifolds

Xu Cheng, Ernani Ribeiro, Detang Zhou

摘要:

在这篇文章中,我们给出了完全非紧梯度Ricci孤子和拟Einstein流形的体积增长估计,类似于Bishop,Calabi和Yau关于具有非负里奇曲率的完全黎曼流形的经典结果.证明了完全非紧梯度收缩Ricci孤子的体积增长的一个精确估计。此外,我们还证明了具有$λ<0$和$μ\leq 0$的完备非紧拟Einstein流形的测地球至多具有上界体积增长.

英文摘要:

In this article, we provide some volume growth estimates for complete noncompact gradient Ricci solitons and quasi-Einstein manifolds similar to the classical results by Bishop, Calabi and Yau for complete Riemannian manifolds with nonnegative Ricci curvature. We prove a sharp volume growth estimate for complete noncompact gradient shrinking Ricci soliton. Moreover, we provide upper bound volume growth estimates for complete noncompact quasi-Einstein manifolds with $λ=0.$ In addition, we prove that geodesic balls of complete noncompact quasi-Einstein manifolds with $λ<0$ and $μ\leq 0$ have at most exponential volume growth.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑