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arXiv 1301.0290math.DG
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几乎孤子对偶

Almost soliton duality

Gideon Maschler

摘要:

梯度Ricci几乎孤子是由Pigola,Rigoli,Rimoldi和Setti提出的。它们被定义为孤子,只是要求度规系数是光滑函数而不是常数。证明了任意一个几乎孤子与另一个孤子函数为负的几乎孤子共形。研究了单孤子和源、靶均为孤子的情况。在源是Kähler的情况下,目标度规的完备性也得到了检验,并且在Derdzinski和Maschler给出的意义下,目标度规具有特殊的Kähler-Ricci势。

英文摘要:

Gradient Ricci almost solitons were introduced by Pigola, Rigoli, Rimoldi and Setti. They are defined as solitons except that the metric coefficient is required to be a smooth function rather than a constant. It is shown that any almost soliton is conformal to another almost soliton having a soliton function which is minus the original one. Uniqueness, and the case where both the source and target are solitons, are studied. Completeness of the target metric is also examined in the case where the source is Kähler and admits a special Kähler-Ricci potential in the sense given by Derdzinski and Maschler.

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