Abstract
We survey works on collapsing Riemannian manifolds with a lower bound of sectional curvature, focusing on the three-dimensional case. We also explain the basics of Seifert manifolds and Alexandrov spaces quickly and a key idea of our proof of the volume collapsing theorem.
Citation
Takashi Shioya. "Collapsing three-manifolds with a lower curvature bound." Tohoku Math. J. (2) 63 (4) 471 - 487, 2011. https://doi.org/10.2748/tmj/1325886277
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