Browsing by Author "Dunsby, Peter"

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1+1+2 covariant approach to gravitational lensing in f(R) gravity

Author: Nzioki, Anne Marie Date: 2009 In this thesis, we develop the 1 + 1 + 2 formalism, a technique originally devised for General Relativity, to treat spherically symmetric spacetimes in for fourth order theories of gravity. Using this formalism, we derive equations for a ... Read more
Applied mathematics - dynamics

Author: Dunsby, Peter Date: 2010 These resources are a selection of audio and video podcasts from a first year Dynamics class (MAM1044H) at the University of Cape Town. The lectures cover a wide range of topics. A selection of audio and video podcasts from a first year class ... Read more c b
Cosmological magnetogenesis

Author: Zunckel, Caroline L Date: 2005 In this thesis, second-order gauge-invariant perturbation theory is used to develop a selfconsistent framework in which the non-linear coupling between inflationary gravitational waves and a large-scale magnetic field is investigated, as means ... Read more
Investigating the parameter space of viable models for f(R) gravity

Author: Kandhai, Sulona Date: 2019 The accelerated expansion of spacetime intuitively points to the existence of new, unknown energy fields pervading the universe, but it is has also spurred the growth of the research field of modified gravity theories. Of these, f(R) theories ... Read more

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