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   General relativity

   General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1915. ... General relativity plays a central role in modelling all these phenomena, and observations provide strong evidence for the existence of black holes with the properties predicted by the theory.
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   Wave

   A wave is a disturbance that propagates through space and time, usually with transference of energy. ... Gravitational waves, which are nonlinear fluctuations in the curvature of spacetime predicted by General Relativity, but which have yet to be observed empirically
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   Tests of general relativity

   At its introduction in 1915, the general theory of relativity did not have a solid empirical foundation. ... Finding the existence of gravitational waves as predicted by general relativity is a critical test of the validity of the theory.
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   Introduction to general relativity

   General relativity (GR) is a theory of gravitation that was developed by Albert Einstein between 1907 and 1915. ... The observed pulse patterns are impressively close to those predicted by general relativity.
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   Theory of relativity

   The theory of relativity, or simply relativity, encompasses two theories of Albert Einstein: special relativity and general relativity. However, the word "relativity" is sometimes used in reference to Galilean invariance.
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   Special relativity

   General relativity becomes special relativity at the limit of weak field. ... Lorentz violation found, but as predicted by DFM to confirm constancy of 'c.'
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   Alternatives to general relativity

   Alternatives to general relativity are physical theories that attempt to describe the phenomena of gravitation in competition to Einstein's theory of general relativity. There have been many different attempts at constructing an ideal theory of gravity.
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   Status of special relativity

   The Sagnac effect, a phenomenon that is taken in to account in GPS synchronisation procedures, is predicted by both special relativity and Galilean relativity and is thus neutral evidence as far as special relativity is concerned. ... Tests of general relativity
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   Mathematics of general relativity

   The mathematics of general relativity refers to various mathematical structures and techniques that are used in studying and formulating Albert Einstein's theory of general relativity. The main tools used in this geometrical theory of gravitation are tensor fields defined on a Lorentzian manifold representing spacetime.
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    Mass in general relativity

    The concept of mass in general relativity (GR) is more complex than the concept of mass in special relativity. In fact, general relativity does not offer a single definition for the term mass, but offers several different definitions which are applicable under different circumstances.

Explore the following pages on Powerset:

• General relativity,
• Wave,
• Tests of general relativity,
• Introduction to general relativity,
• Theory of relativity,
• Special relativity,
• Alternatives to general relativity,
• Status of special relativity,
• Mathematics of general relativity,
• Mass in general relativity

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