On Bach-flat gradient shrinking Ricci solitons

On Bach-flat gradient shrinking Ricci solitons
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DOI:
10.1215/00127094-2147649
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发表时间:
2011-05
期刊:
arXiv: Differential Geometry
影响因子:
--
通讯作者:
H. Cao;Qiang Chen
H. Cao;Qiang Chen
中科院分区:
其他
文献类型:
--
作者:
H. Cao;Qiang Chen

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本文对n维(n>3)完全Bach平坦梯度收缩Ricci孤子进行了分类。更精确地说,我们证明了任何4维Bach平坦梯度收缩Ricci孤子要么是Einstein的,要么是局部共形平坦的,因此是高斯收缩孤子R^4 $或圆柱体S^3\times R$的有限商。更一般地说,当n>4时,一个巴赫平坦梯度收缩里奇孤子要么是爱因斯坦,要么是高斯收缩孤子$R^n$的有限商,要么是N^{n-1}\乘以R$的乘积,其中N^{n-1}$是爱因斯坦。
In this paper, we classify n-dimensional (n>3) complete Bach-flat gradient shrinking Ricci solitons. More precisely, we prove that any 4-dimensional Bach-flat gradient shrinking Ricci soliton is either Einstein, or locally conformally flat hence a finite quotient of the Gaussian shrinking soliton $R^4$ or the round cylinder $S^3\times R$. More generally, for n>4, a Bach-flat gradient shrinking Ricci soliton is either Einstein, or a finite quotient of the Gaussian shrinking soliton $R^n$ or the product $N^{n-1}\times R$, where $N^{n-1}$ is Einstein.