Ghodratallah Fasihi-Ramandi, Shahroud Azami, Vahid Pirhadi
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引用次数: 0
Abstract
We consider the metric-affine geometry whose intrinsic structure is defined in terms of two independent objects: the Riemannian metric and the general affine connection. By means of the metric tensor, for contraction of Riemannain curvature of the affine connection, we form an action density for gravity and matter. Variations of our natural Lagrangian give us two equations. The derived equations contain the Einstein field equation. The other equation describes matter in space-time. In this framework, the affine connection is related to the concept of matter in s*pace-time, so matter can be interpreted as a factor which leads curving and twirling of the space-time manifold.
期刊介绍：
Gravitation and Cosmology is a peer-reviewed periodical, dealing with the full range of topics of gravitational physics and relativistic cosmology and published under the auspices of the Russian Gravitation Society and Peoples’ Friendship University of Russia. The journal publishes research papers, review articles and brief communications on the following fields: theoretical (classical and quantum) gravitation; relativistic astrophysics and cosmology, exact solutions and modern mathematical methods in gravitation and cosmology, including Lie groups, geometry and topology; unification theories including gravitation; fundamental physical constants and their possible variations; fundamental gravity experiments on Earth and in space; related topics. It also publishes selected old papers which have not lost their topicality but were previously published only in Russian and were not available to the worldwide research community
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