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Representations of surface groups and Higgs bundles - I

Gothen, P (Universidade do Porto)
Friday 07 January 2011, 10:00-11:00

Seminar Room 1, Newton Institute


Classical Hodge theory uses harmonic forms as preferred representatives of cohomology classes. A representation of the fundamental group of a Riemann surface gives rise to a corresponding flat bundle. A Theorem of Donaldson and Corlette shows how to find a harmonic metric in this bundle. A flat bundle corresponds to class in first non-abelian cohomology and the Theorem can be viewed as an analogue of the classical representation of de Rham cohomology classes by harmonic forms.


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