Universität Augsburg
Institut für Mathematik

Siegel der Universität Augsburg

 

Oberseminar Differentialgeometrie

 

Dr. Georg Frenck
Universität Augsburg

 
spricht am
 
Montag, 18. Oktober 2021
 
um
 
16:15 Uhr
 
im
 
1009/L und Zoom (hybride Veranstaltung)
 
über das Thema:
 

»Characteristic classes of manifold-bundles over spheres«

Abstract:
Manifold bundles with fiber M are classified by the classifying space of it diffeomorphism group Diff(M). Hence, the cohomology of this classifying space is the ring of characteristic classes for manifold bundles. In this talk I will describe which rational characteristic classes are attained by manifold bundles over spheres. As an application, one can deduce the existence of many fiber bundles where base and fiber both admit positive scalar, Ricci and even sectional curvature, whereas the total space does not.

If you want to take part via Zoom please ask Prof. Dr. Bernhard Hanke for­ login details.


 

Hierzu ergeht herzliche Einladung.
Prof. Dr. Bernhard Hanke
 

Kaffee, Tee und Gebäck eine halbe Stunde vor Vortragsbeginn im Raum 2006 (L1).



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