Dr Karim Johannes Becher (Universitaet Konstanz)

will speak on

The Pfister Factor Conjecture

Time: 4:00PM
Date: Wed 26th September 2007
Location: Mathematical Sciences Seminar Room [map]

Abstract: The characteristic properties of Pfister forms in quadratic form theory
suggest several possibilities to define `Pfister involutions' in the more general setting of central simple algebras with involution.
It will be explained why these different notions coincide at
least in the split case (i.e., for matrix algebras).
This confirms a conjecture, originally formulated by Daniel Shapiro
in the context of compositions of quadratic forms.

(This talk is part of the K-Theory, Quadratic Forms and Number Theory series.)

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