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arXiv 0710.5579math.DG
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具有非负曲率的非紧收缩4-孤子

Noncompact Shrinking 4-Solitons with Nonnegative Curvature

Aaron Naber

摘要:

我们证明如下:设(M,g,X)是一个具有有界非负曲率算子的非紧四维收缩孤子,则(M,g)与R^4等距,或者是S^2xR^2或S^3xR的有限商.在这个过程中,我们还表明,一个完整的收缩孤子(M,g,X)与有界曲率是梯度和k-非塌陷和膨胀的I型奇点是一个收缩孤子。进一步在三维空间中,我们证明了只有在Rc>= 0的假设下,具有有界曲率的收缩孤子才能被分类。

英文摘要:

We prove the following: Let (M,g,X) be a noncompact four dimensional shrinking soliton with bounded nonnegative curvature operator, then (M,g) is isometric to R^4 or a finite quotient of S^2xR^2 or S^3xR. In the process we also show that a complete shrinking soliton (M,g,X) with bounded curvature is gradient and k-noncollapsed and the dilation of a Type I singularity is a shrinking soliton. Further in dimension three we show shrinking solitons with bounded curvature can be classified under only the assumption of Rc>= 0.

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。

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