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Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies
Includes abstract.
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Mathematics and Applied Mathematics
2014
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| _version_ | 1867613225250455552 |
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| access_status_str | Open Access |
| author | Gidelew, Amare Abebe |
| author2 | Dunsby, Peter K S |
| author_browse | Dunsby, Peter K S Gidelew, Amare Abebe |
| author_facet | Dunsby, Peter K S Gidelew, Amare Abebe |
| author_sort | Gidelew, Amare Abebe |
| collection | Thesis |
| description | Includes abstract. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/4884 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:45.765Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Mathematics and Applied Mathematics |
| publisherStr | Department of Mathematics and Applied Mathematics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/4884 Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies Gidelew, Amare Abebe Dunsby, Peter K S Mathematics and Applied Mathematics Includes abstract. Includes bibliographical references (leaves 82-84). We study the evolution of scalar cosmological perturbations in the 1+3 Covariant Gauge-Invariant formalism for generic f(R) theories of gravity. Working in the energy frame of the total matter, we give a complete set equations describing the evolution of matter and curvature fluctuations for a multi-fluid cosmological medium. We then specialize to a radiation-dust fluid described by barotropic equations of state. We apply the perturbation equations around a background solution of Rⁿ gravity and look at exact solutions for scales much smaller and much larger than the Hubble radius. 2014-07-31T08:07:06Z 2014-07-31T08:07:06Z 2009 Master Thesis Masters MSc http://hdl.handle.net/11427/4884 eng application/pdf Department of Mathematics and Applied Mathematics Faculty of Science University of Cape Town |
| spellingShingle | Mathematics and Applied Mathematics Gidelew, Amare Abebe Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies |
| thesis_degree_str | Master's |
| title | Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies |
| title_full | Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies |
| title_fullStr | Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies |
| title_full_unstemmed | Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies |
| title_short | Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies |
| title_sort | covariant perturbations in f r gravity of multi component fluid cosmologies |
| topic | Mathematics and Applied Mathematics |
| url | http://hdl.handle.net/11427/4884 |
| work_keys_str_mv | AT gidelewamareabebe covariantperturbationsinfrgravityofmulticomponentfluidcosmologies |