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Seminario
"Charges and Monopoles in M-theory"

Relatore: Dott. Kurt Lechner- Universita' di Padova

Aula Einstein
10 Dicembre 2002 ore 16.30

Abstract
As the dynamics of four-dimensional magnetic monopoles requires the introduction of an unobservable Dirac-string, the dynamics of magnetic extended objects in M-theory requires the introduction of an unobservable Dirac-brane. There are, however, relevant situations in M-theory where the use of Dirac-branes leads to inconsistencies. After recalling the basic features of extended charges and monopoles in M-theory, the seminar describes these situations and presents a general solution to the problem: Dirac-branes have to be replaced with less singular objects, so called Chern-kernels.