ODPADE ZARADI NEPREDVIDENIH TEŽAV (napoved nadomestila): Prof. John A. Madore: Noncommutative geometry and its ruse to blow up the Big-Bang

     Noncommutative geometry and its ruse to blow up the Big-Bang  

     Prof. John A. Madore, Laboratoire de Physique Théorique d'Orsay, Université de Paris-Sud 11, Paris

There are many noncommutative geometries, which means that the subject can eventually be shown to be useless but never wrong. The version we favour is most conveniently formulated using an extension of Cartan's moving-frame formalism, uses a Minkowski-signature metric and has no need of a action. The field equations are derived from Jacobi identities. A general introduction will be given to the subject, in particular when and why one might expect problems when forcing coordinates to commute. Briefly will be mentioned the possibility of replacing the hidden manifold of Kaluza-Klein theory by a matrix geometry and of blowing up the Big Bang.