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  2. Scalar–tensor–vector gravity - Wikipedia

    en.wikipedia.org/wiki/Scalartensorvector...

    Scalar–tensorvector gravity (STVG) [1] is a modified theory of gravity developed by John Moffat, a researcher at the Perimeter Institute for Theoretical Physics in Waterloo, Ontario. The theory is also often referred to by the acronym MOG ( MO dified G ravity ).

  3. Scalar–tensor theory - Wikipedia

    en.wikipedia.org/wiki/Scalartensor_theory

    An action of such a gravitational scalar–tensor theory can be written as follows: = [() () + (,)], where is the metric determinant, is the Ricci scalar constructed from the metric , is a coupling constant with the dimensions , () is the scalar-field potential, is the material Lagrangian and represents the non-gravitational fields.

  4. Tensor–vector–scalar gravity - Wikipedia

    en.wikipedia.org/wiki/Tensorvectorscalar...

    Tensorvector–scalar gravity (TeVeS), [1] developed by Jacob Bekenstein in 2004, is a relativistic generalization of Mordehai Milgrom's Modified Newtonian dynamics (MOND) paradigm. [2] [3] The main features of TeVeS can be summarized as follows: As it is derived from the action principle, TeVeS respects conservation laws;

  5. Scalar theories of gravitation - Wikipedia

    en.wikipedia.org/wiki/Scalar_theories_of_gravitation

    Brans–Dicke theory is a scalar-tensor theory, not a scalar theory, meaning that it represents the gravitational interaction using both a scalar field and a tensor field. We mention it here because one of the field equations of this theory involves only the scalar field and the trace of the stress–energy tensor, as in Nordström's theory.

  6. Nonsymmetric gravitational theory - Wikipedia

    en.wikipedia.org/wiki/Nonsymmetric_gravitational...

    This led Moffat to propose metric-skew-tensor-gravity (MSTG), [5] in which a skew symmetric tensor field postulated as part of the gravitational action. A newer version of MSTG, in which the skew symmetric tensor field was replaced by a vector field, is scalar–tensorvector gravity (STVG).

  7. Mathematics of general relativity - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_general...

    A tensor field is then defined as a map from the manifold to the tensor bundle, each point being associated with a tensor at . The notion of a tensor field is of major importance in GR. For example, the geometry around a star is described by a metric tensor at each point, so at each point of the spacetime the value of the metric should be given ...

  8. Brans–Dicke theory - Wikipedia

    en.wikipedia.org/wiki/Brans–Dicke_theory

    In physics, the Brans–Dicke theory of gravitation (sometimes called the Jordan–Brans–Dicke theory) is a competitor to Einstein's general theory of relativity.It is an example of a scalar–tensor theory, a gravitational theory in which the gravitational interaction is mediated by a scalar field as well as the tensor field of general relativity.

  9. Linearized gravity - Wikipedia

    en.wikipedia.org/wiki/Linearized_gravity

    The Einstein field equation (EFE) describing the geometry of spacetime is given as = where is the Ricci tensor, is the Ricci scalar, is the energy–momentum tensor, = / is the Einstein gravitational constant, and is the spacetime metric tensor that represents the solutions of the equation.

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