Universität Augsburg
Institut für Mathematik

Siegel der Universität Augsburg

 

Oberseminar Differentialgeometrie

 

Professor Dr. Wolfgang Steimle
Universität Augsburg

 
spricht am
 
Montag, 22. Juni 2020
 
um
 
16:00 Uhr
 
im
 
Zoom
 
über das Thema:
 

»Surgery methods in hermitian K-theory«

Abstract:

As Ranicki showed, there is a well-defined notion of cobordism between Poincaré complexes, which can be studied by an algebraic version of surgery. Improving on this, we show that the cobordism category of Poincaré complexes can be studied by an algebraic version of parametrized surgery à la Galatius-Randal-Williams. Together with a different analysis of this cobordism category in terms of algebraic K- and L-theory, this confirms conjectures of Karoubi and others on the K-theory of quadratic forms.

Joint works with Hebestreit and Calmès-Dotto-Harpaz-Hebestreit-Land-Moi-Nardin-Nikolaus.


 

Hierzu ergeht herzliche Einladung.
Prof. Dr. Bernhard Hanke



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