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SUMMARY:Philipp Reiser (University of Fribourg)
DTSTART:20240911T160000Z
DTEND:20240911T170000Z
DTSTAMP:20260423T052928Z
UID:VSGS/95
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/VSGS/95/">Tw
 isted suspensions\, torus actions\, and positive Ricci curvature</a>\nby P
 hilipp Reiser (University of Fribourg) as part of Virtual seminar on geome
 try with symmetries\n\n\nAbstract\nThe twisted suspension of a manifold ca
 n be seen as a smooth analogue of the classical suspension operation for t
 opological spaces. Its construction is motivated by the spinning operation
  in knot theory and it is obtained by surgery on a fibre of a principal ci
 rcle bundle over the given manifold. In this talk I will show that Riemann
 ian metrics of positive Ricci curvature can be lifted along twisted suspen
 sions. As application we obtain first examples of simply-connected manifol
 ds of positive Ricci curvature with maximal symmetry rank in any dimension
 \, and we obtain new examples of (rational) homology spheres with a Rieman
 nian metric of positive Ricci curvature.\n
LOCATION:https://researchseminars.org/talk/VSGS/95/
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