Conveners
Friday Session 2
- Krzysztof Głód (Astronomical Observatory of the Jagiellonian University)
Andrzej Woszczyna
(Politechnika Krakowska)
21/09/2018, 11:00
Darboux transformations convert the cosmological perturbation equations to the form of the d'Alembert equation. Consequently, the Noether constants (the conserved hamiltonian for instance) can be easily found. The exact form of the Darboux transformation, however, is the subject of guess (Field Shepley 1968), what strongly limitates the effectivness of the method. In the present talk we...
Szymon Sikora
(Astronomical Observatory, Jagiellonian University)
21/09/2018, 11:30
During this talk, I will present the method of the construction of the approximate solutions in the framework of the cosmological perturbation theory in the order higher than two. I will restrict to the synchronous gauge and impose the particular symmetry condition by demanding that the metric is invariant under every permutation of the spatial coordinates. In this setup, I will show how to...
Sebastian Szybka
(Jagiellonian University)
21/09/2018, 12:00
Within the Green-Wald backreaction framework, one may calculate the effect of small scale inhomogeneities on the global structure of a background spacetime. I will discuss properties of a background spacetime representing cylindrically symmetric high frequency gravitational and scalar standing waves.
