arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0906.0475math.DGmath.AP
收藏

三个$C R $流形上Webster标量曲率问题解的存在性和多重性

Existence and Multiplicity results for the prescribed Webster Scalar Curvature Problem on three $C R $ manifolds

H. Chtioui, M. Ould Ahmedou, R. Yacoub

摘要:

本文研究了局部共形CR等价于$\mathbb{C}^{2}$的单位球面$\mathbb{S}^{3}$的$3-$维CR紧致流形上具有预定Webster数量曲率的切触形式的存在性.由于Kazdan-Warner型障碍,必须给出关于要实现为Webster数量曲率的函数$H$的条件。我们证明了新的存在性结果的基础上的一种新的Euler-Hopf型公式。我们的论证给出了所得解的Morse指数的一个上界。我们还给出了具有相同Webster数量曲率的共形接触形式的个数的下界。

英文摘要:

This paper is devoted to the existence of contact forms of prescribed Webster scalar curvature on a $3-$dimensional CR compact manifold locally conformally CR equivalent to the unit sphere $\mathbb{S}^{3}$ of $\mathbb{C}^{2}$. Due to Kazdan-Warner type obstructions, conditions on the function $H$ to be realized as a Webster scalar curvature have to be given. We prove new existence results based on a new type of Euler-Hopf type formula. Our argument gives an upper bound on the Morse index of the obtained solution. We also give a lower bound on the number of conformal contact forms having the same Webster scalar curvature.

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。

↑