header
Local cover image
Local cover image
Image from OpenLibrary

f(R) or f(T)-Theories : Unification Priciple and Problems of Standard Cosmology / Samah Nabil Abu-Elhamd Osman ; Supervised Mamdouh Isaac Wanas

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Samah Nabil Abuelhamd Osman , 2017Description: 145 P. ; 25cmOther title:
  • نظريات الانحناء أم الالتواء : قاعدة التوحيد و مشكلات علم الكون العياري [Added title page title]
Subject(s): Online resources: Available additional physical forms:
  • Issued also as CD
Dissertation note: Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Astronomy and Meteorology Summary: It 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
Tags from this library: No tags from this library for this title. Log in to add tags.
Star ratings
    Average rating: 0.0 (0 votes)
Holdings
Item type Current library Home library Call number Copy number Status Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.01.Ph.D.2017.Sa.F (Browse shelf(Opens below)) Not for loan 01010110074838000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.01.Ph.D.2017.Sa.F (Browse shelf(Opens below)) 74838.CD Not for loan 01020110074838000

Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Astronomy and Meteorology

It 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

Issued also as CD

There are no comments on this title.

to post a comment.

Click on an image to view it in the image viewer

Local cover image
Share
Under the supervision of New Central Library Manager

Implemented and Customized by: Eng.M.Mohamady
Contact:   info@cl.cu.edu.eg

© All rights reserved  New Central Library