# spring 2013

## Given seminars:

March 12, 2013
Active galactic nuclei at zero redshift
Prof. Steven N. Shore
Dipartimento di Fisica "Enrico Fermi", Universita di Pisa, Italia

March 19, 2013
Øešení klasických sigma modelù a strun v zakøiveném pozadí
Katedra fyziky, FJFI ÈVUT
(seminar in Czech language)
March 26, 2013
Black hole inequalities
Prof. Marcus Ansorg
Institute of Theoretical Physics, F. Schiller University Jena, Germany
April 2, 2013
Higgs hair of a rotating black hole
dr. David Kubizòák
Perimeter Institute for Theoretical Physics, Waterloo, Ontario, Canada

April 9, 2013
Semináø se nekoná
(seminar in Czech language)
April 16, 2013
Bondi mass as a limit of Penrose mass
dr. Martin Scholtz
Katedra aplikované matematiky, Fakulta dopravní ÈVUT
(seminar in Czech language)
April 23, 2013
Self-energy anomaly of classical charges in higher dimensions
dr. Andrei Zelnikov
Theoretical Physics Institute, Department of Physics, University of Alberta, Edmonton
April 30, 2013
Spinoptics in a curved spacetime
Prof. Valeri P. Frolov
Theoretical Physics Institute, Department of Physics, University of Alberta, Edmonton

May 7, 2013
Linearized gravity and conserved charges / The black hole stability problem
Dipl.-Phys. Steffen Aksteiner, Prof. Lars Andersson
Center of Applied Space Technology and Microgravity (ZARM), Department of Production Engineering, University of Bremen / Division of Geometric Analysis and Gravitation, Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Potsdam
May 14, 2013
Decoupling gravitational perturbations in higher dimensions
Dr. Mahdi Godazgar
Department of Applied Mathematics and Theoretical Physics, University of Cambridge, UK

May 21, 2013
Atlas 2: package na diferenciální geometrii pro Mathematicu
Jakub Haláèek
ITP
(seminar in Czech language)
May 28, 2013
On the completeness of impulsive gravitational wave spacetimes
Clemens Sämann
DIANA, Faculty of Mathematics, University of Vienna

After briefly discussing the non-impulsive (smooth) case, we will show that every impulsive wave-type spacetime of the form $M=N\times R^2_1$, with line element $ds^2 = dh^2 + 2 du dv + f(x)\delta(u) du^2$ is geodesically complete. Here $(N,h)$ is an arbitrary connected, complete Riemannian manifold, $f$ is a smooth function and $\delta$ denotes the Dirac distribution on the hypersurface $u=0$. Moreover the geodesics behave as is physically expected.

July 10, 2013
POZOR! Posunuto na støedu (od 13:10)!!!
Dark universe and marvels of gravity: exploring the idea of a geometric interpretation of the dark phenomenology
Dr. Sante Carloni
ESA Advanced Concepts Team, ESTEC, Noordwijk, The Netherlands

In this talk I will present the idea of a geometrical interpretation of dark phenomena on cosmological and astrophysical scales. In particular, I will review the status of our knowledge on the physics of extensions of General Relativity in relation with dark matter and dark energy and I will delineate the new challenges in this research field for the next years.

## Other semesters:

© October 31, 2013; Oldøich Semerák <semerak@mbox.troja.mff.cuni.cz>
© January 15, 2018; generated by application seminar, version 2.04 (2003-09-02); webmaster <Pavel.Krtous@mff.cuni.cz>