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| 003 | EG-GiCUC | ||
| 005 | 20250223032003.0 | ||
| 008 | 180506s2017 ua f m 000 0 eng d | ||
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_aEG-GiCUC _beng _cEG-GiCUC |
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| 041 | 0 | _aeng | |
| 049 | _aDeposite | ||
| 097 | _aPh.D | ||
| 099 | _aCai01.12.01.Ph.D.2017.Sa.F | ||
| 100 | 0 | _aSamah Nabil Abuelhamd Osman | |
| 245 | 1 | 0 |
_af(R) or f(T)-Theories : _bUnification Priciple and Problems of Standard Cosmology / _cSamah Nabil Abu-Elhamd Osman ; Supervised Mamdouh Isaac Wanas |
| 246 | 1 | 5 |
_aنظريات الانحناء أم الالتواء : _bقاعدة التوحيد و مشكلات علم الكون العياري |
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_aCairo : _bSamah Nabil Abuelhamd Osman , _c2017 |
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| 300 |
_a145 P. ; _c25cm |
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| 502 | _aThesis (Ph.D.) - Cairo University - Faculty of Science - Department of Astronomy and Meteorology | ||
| 520 | _aIt is known that standard cosmology su{uFB00}ers from some problems. Among suggested solutions are f(R) and f(T) theories in which energy-momentum distri- bution is described by a phenomenological second order tensor. In a version of absolute parallelism (AP-) geometry, a pure geometric {uFB01}eld theory is constructed in the context of the Uni{uFB01}cation Principle. This principle guarantees writing every quantity in the theory using the building blocks (BB) of the AP-geometry only. Physical analysis of the theory shows that the theory represents a uni{uFB01}ed gravity and electromagnetic {uFB01}eld. Geometric expressions for Poisson equation for gravity and electromagnetic {uFB01}elds are obtained. Also, we show that the suggested theory has a successful GR-limit. A general di{uFB00}erential identity is derived in a modi{uFB01}ed version of AP-geometry. The importance of this di{uFB00}erential identity is its relation to conservation in the context of geometrization philosophy. Applications of the suggested theory in the domain of cosmology, satisfying the cosmological principle, solve {uFB02}atness and particle horizons problems | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _af(R) or f(T)-Theories | |
| 653 | 4 | _aStandard cosmology problems | |
| 653 | 4 | _aUnification Priciple | |
| 700 | 0 |
_aMamdouh Isaac Wanas , _eSupervisor |
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| 856 | _uhttp://172.23.153.220/th.pdf | ||
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_aEnas _eCataloger |
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_aNazla _eRevisor |
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_2ddc _cTH |
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_c66112 _d66112 |
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