发表机构
Università degli Studi di Cagliari; Università degli Studi di Salerno(卡利亚里大学; 萨莱诺大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文首次构造了所有奇数维≥5中非接触度量的拟接触度量结构,并在5维通过形变Sasaki-Einstein SU(2)-结构得到紧致齐次例子,还推导了K-接触的Ricci曲率判据。
AI 中文摘要
我们构造了第一个在所有大于或等于$5$的奇数维中非接触度量的拟接触度量结构例子。在维度$5$中,我们通过形变Sasaki-Einstein $\mathrm{SU}(2)$-结构,构造了一个具有Killing特征向量场的单参数族这样的例子。这产生了在$S^5$上的紧致、齐次例子。在任意维度中,我们研究了具有Killing特征向量场的拟接触度量结构,并推导了该结构为K-接触的Ricci曲率判据。
英文摘要
We construct the first examples of quasi-contact metric structures that are not contact metric in every odd dimension greater than or equal to $5$. In dimension $5$, we construct a one-parameter family of such examples with a Killing characteristic vector field by deforming Sasaki-Einstein $\mathrm{SU}(2)$-structures. This yields compact, homogeneous examples on $S^5$. In arbitrary dimensions, we investigate quasi-contact metric structures with a Killing characteristic vector field and derive a Ricci curvature criterion for the structure to be K-contact.
Comments21 pages