Seminar series
Date
Thu, 24 Nov 2016
Time
16:00 -
17:00
Location
C5
Speaker
Daniel Bruegmann
Organisation
MPI Bonn
Spectra provide a way of understanding cohomology theories in terms of homotopy theory. Spectra are a bit like CW-complexes, they have homotopy groups which may be used to characterize homotopy equivalences. However, a spectrum has homotopy groups in negative degrees, too, and they are abelian groups in all degrees. We will discuss spectra representing ordinary cohomology, bordism, and K-theory.