arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1104.3185math.DGmath.AP
收藏

一个最优间隙定理

An optimal gap theorem

Lei Ni

摘要:

通过求解Hodge-Laplace热方程的$d$ -闭正$(1, 1)$ -形式的Cauchy问题,我们证明了具有非负对分曲率的Kähler流形的最优间隙定理,该定理断言,如果以任何不动点$o$为中心的半径为$r$的球上的数量曲率的平均值是$o(r^{-2})$的函数,则流形是平坦的.此外,通过相对单调性估计,我们得到一个更强的声明,即一个“积极的质量”型的结果,断言,如果$(M, g)$是不平坦的,那么$\liminf_{r\to \infty} \frac{r^2}{V_o(r)}\int_{B_o(r)}\mathcal{S}(y)\, dμ(y)>0$的任何$o\in M$。

英文摘要:

By solving the Cauchy problem for the Hodge-Laplace heat equation for $d$-closed, positive $(1, 1)$-forms, we prove an optimal gap theorem for Kähler manifolds with nonnegative bisectional curvature which asserts that the manifold is flat if the average of the scalar curvature over balls of radius $r$ centered at any fixed point $o$ is a function of $o(r^{-2})$. Furthermore via a relative monotonicity estimate we obtain a stronger statement, namely a `positive mass' type result, asserting that if $(M, g)$ is not flat, then $\liminf_{r\to \infty} \frac{r^2}{V_o(r)}\int_{B_o(r)}\mathcal{S}(y)\, dμ(y)>0$ for any $o\in M$.

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。

↑