Relativity and Gravitation

Gravitation in Flat Space-Time and General Relativity

A covariant theory of gravitation in flat space-time is stated and compared with general relativity. The results of the theory of gravitation in flat space-time and of general relativity agree for weak gravitational fields to low approximations. For strong fields the results of the two theories deviate from one another. Flat space-time theory of gravitation gives under some natural assumptions ...

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Another Glance at the Rainbow Y? General Relativity and Gravitation

In ationary cosmology predicts the generation of both density perturbation and relic gravitons. Tests of these predictions, especially the relic gravitons, will be very crucial to the veri cation of in ation. E orts have been made to distinguish di erent in ation models using observed anisotropies of the cosmic microwave background radiation. However, the fact that both scalar and tensor modes ...

A Unified Theory of General Relativity of Gravitation and Electromagnetism. Iv.

It being required that the determinant g of gij be different from zero, and in fact negative, a contravariant symmetric tensor giJ is defined by g'Jg,, = Vk, where 4Vk is the Kronecker delta, and where a repeated superscript and subscript, as i in this case, means the sum as the index takes the values 1 to 4. This notation holds throughout the paper. For any coefficients of connection rijh, sym...

Information transmittal, Newton's law of gravitation, and tensor approach to general relativity

The special relativity considered in [A. Einstein, Zur Elektrodynamik der bewegte Körper. Ann. Physik, 17 (1905) 891–921] is based on the concept of finite speed of information transmittal by the available signals (rays of light). It is demonstrated that the same concept applies to Newton’s law of universal gravitation since the magnitude of distances between attracting masses can be physically...