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  2. File : Portrait of Albert Einstein and Others (1879-1955 ...

    en.wikipedia.org/wiki/File:Portrait_of_Albert...

    The original can be viewed here: Portrait of Albert Einstein and Others (1879-1955), Physicist - Original.jpg: . Modifications made by Bammesk . This is a featured picture on Wikimedia Commons ( Featured pictures ) and is considered one of the finest images.

  3. Exact solutions in general relativity - Wikipedia

    en.wikipedia.org/wiki/Exact_solutions_in_general...

    One can fix the form of the stress–energy tensor (from some physical reasons, say) and study the solutions of the Einstein equations with such right hand side (for example, if the stress–energy tensor is chosen to be that of the perfect fluid, a spherically symmetric solution can serve as a stellar model)

  4. Einstein-aether theory - Wikipedia

    en.wikipedia.org/wiki/Einstein-aether_theory

    In physics the Einstein-aether theory, also called aetheory, is the name coined in 2004 for a modification of general relativity that has a preferred reference frame and hence violates Lorentz invariance. These generally covariant theories describes a spacetime endowed with both a metric and a unit timelike vector field named the aether.

  5. Lambdavacuum solution - Wikipedia

    en.wikipedia.org/wiki/Lambdavacuum_solution

    In general relativity, a lambdavacuum solution is an exact solution to the Einstein field equation in which the only term in the stress–energy tensor is a cosmological constant term. This can be interpreted physically as a kind of classical approximation to a nonzero vacuum energy .

  6. Aether theories - Wikipedia

    en.wikipedia.org/wiki/Aether_theories

    As historians such as John Stachel argue, Einstein's views on the "new aether" are not in conflict with his abandonment of the aether in 1905. As Einstein himself pointed out, no "substance" and no state of motion can be attributed to that new aether. [10] Einstein's use of the word "aether" found little support in the scientific community, and ...

  7. Vacuum solution (general relativity) - Wikipedia

    en.wikipedia.org/wiki/Vacuum_solution_(general...

    Kasner metric (An anisotropic solution, used to study gravitational chaos in three or more dimensions). These all belong to one or more general families of solutions: the Weyl vacua (Hermann Weyl) (the family of all static vacuum solutions), the Beck vacua (Guido Beck 1925 [2]) (the family of all cylindrically symmetric nonrotating vacuum ...

  8. Lorentz ether theory - Wikipedia

    en.wikipedia.org/wiki/Lorentz_ether_theory

    And referring to the Fizeau experiment, he even wrote: "The aether is all but in our grasp." He also said the aether is necessary to harmonize Lorentz's theory with Newton's third law. Even in 1912 in a paper called "The Quantum Theory", Poincaré ten times used the word "aether", and described light as "luminous vibrations of the aether". [A 19]

  9. Gödel metric - Wikipedia

    en.wikipedia.org/wiki/Gödel_metric

    The Gödel metric, also known as the Gödel solution or Gödel universe, is an exact solution, found in 1949 by Kurt Gödel, [1] of the Einstein field equations in which the stress–energy tensor contains two terms: the first representing the matter density of a homogeneous distribution of swirling dust particles (see dust solution), and the second associated with a negative cosmological ...

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