Speaker
Nikola Herceg
Description
The formalism of Hopf algebras and Drinfeld twist are introduced along with noncommutative star-product. Star-product is then generalised to differential-geometric structures: vector fields, forms, connection,... Perturbations of Schwarzschild spacetime are then investigated as a practical example. A brief overview of the standard BH perturbation theory can also be given (depending on the duration of the talk): first order metric correction, decomposition into spherical tensor harmonics, axial and polar modes, Regge-Wheeler gauge and potential.
Primary author
Nikola Herceg
