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SUMMARY:Sergio Zamora Barrera (Oregon State University)
DTSTART:20250319T160000Z
DTEND:20250319T170000Z
DTSTAMP:20260423T021223Z
UID:VSGS/105
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/VSGS/105/">T
 opology of manifolds with almost non-negative curvature and maximal rank a
 nd their Gromov--Hausdorff limits</a>\nby Sergio Zamora Barrera (Oregon St
 ate University) as part of Virtual seminar on geometry with symmetries\n\n
 \nAbstract\nThere are many characterizations of the torus as a Riemannian 
 manifold. For example\, it is the only closed manifold of non-negative Ric
 ci curvature and first Betti number equal to its dimension. In this talk w
 e will discuss two problems: \n\n- When such characterizations are replace
 d by slightly weaker hypotheses\, will we still get a torus or something r
 elated? \n\n- If a space X can be approximated by something we know is a t
 orus\, is X necessarily a torus?\n\nWe will discuss both classical and cur
 rent results in different contexts. This includes  joint work with Xingyu 
 Zhu.\n
LOCATION:https://researchseminars.org/talk/VSGS/105/
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