论文标题
Grushin半球作为曲率$ \ ge 1 $的RICCI极限空间
The Grushin hemisphere as a Ricci limit space with curvature $\ge 1$
论文作者
论文摘要
Grushin Sphere是一种几乎是Riemannian的歧管，沿其赤道退化。我们在球体上构建了一系列Riemannian指标，$ s^{m+n} $，带有$ ric \ ge 1 $，以使其Gromov-Hausdorff限制是$ n $ dimensional grushin hemisphere。
The Grushin sphere is an almost-Riemannian manifold that degenerates along its equator. We construct a sequence of Riemannian metrics on a sphere $S^{m+n}$ with $Ric\ge 1$ such that its Gromov-Hausdorff limit is the $n$-dimensional Grushin hemisphere.
