AI 中文总结
该研究针对7维拟正则3-Sasakian轨形的Reeb向量场商空间,构造了含双实参数的SU(3)-结构,验证其为LT-结构,且特定参数下可得到近Kähler结构,并给出多类情形的示例。
AI 中文摘要
我们证明,若$(S,g,ξ_i,η_i,Φ_i)$是7维拟正则3-Sasakian轨形,则其被其中一个Reeb向量场作用得到的商空间$Z$具有由两个实参数参数化的SU(3)-结构。我们计算了该结构的挠率,证明其为LT-结构。此外,对于特定参数取值,我们能在$Z$上构造出近Kähler结构,它是我们构造方法的一个特例。我们给出了正则、拟正则及轨形情形下的若干示例。
英文摘要
We show that if $(S,g,ξ_i,η_i,Φ_i)$ is a quasi-regular $3$-Sasakian orbifold of dimension $7$, then its quotient $Z$ by one of the Reeb vector fields inherits an $SU(3)$-structure parametrized by two real parameters. We compute its torsion and show that it is an LT-structure. Moreover, for certain values of the parameters, we can provide a nearly Kähler structure on $Z$ appearing as a special case of our construction. We give several examples in the regular, quasi-regular and orbifold cases.