Document Type : Research Paper

Author

Assistant Professor, Research Institute for Basic Sciences and Technology, Shahid Beheshti University

Abstract

The concept of general covariance is one of the most important concepts in general theory of relativity, which there are a lot of confusing in the understanding of its correct meaning. In this paper I explain and try to elucidate this concept and I will discuss Anderson- Friedman’s absolute object, regarded as what distinguishes between general relativity and other space – time theories. I also consider Earman’s two definitions of general covariance; formal general covariance and substantive general covariance which by introducing these two definition he gives the distinguishing characteristic of general relativity which is its realization of substantive general covariance. Eventually I compare those two viewpoints and discern their distinction

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