Gravitational theory

Harrison, B. K., Thome, K. S., Wakano, M., Wheeler,J.A. (1965). Gravitational Theory and Gravitational Collapse Chicago, University of Chicago Press. 

B.K. Harrison, K.S. Thorne, M. Wakano, and J.A. Wheeler. Gravitation theory and gravitational collapse , University of Chicago Press, 1965. 

The problem of nonlocality due to instantaneous long-range interaction is now considered both in electromagnetic and in gravitational theory. 

One of the many achievements of Einstein s general relativity was to geometrize gravitational theory. This geometrization consists in the first instance therein that one views the world of physical events as a space-time continuum in four dimensions. Such a continuum is, by definition, represented by a coordinate system. A coordinate system is simply a mapping of a class of world points on a class of four-fold numbers, or what may be called number points x, , x ). 

The essential difference between this theory and the earlier Newtonian gravitation theory that we want to raise is the following In the old theory one assumes a Euclidean space into which a gravitation potential is introduced. However, this potential function has no influence on the space itself. The properties of space were completely independent of those of the potential. On the contrary, the properties of space are identical with those of the gravitation potentials, Qij. 

On various geometries giving a unified electric and gravitational theory. 

This means that the general rule is that capacitances are not constants, the exception being for a restricted domain and a limited class of materials. Such exceptions are met in electrodynamics where nonlinear permittivities are recognized for some materials (Jonscher 1996), but not yet in gravitation theories. Note that this last assertion must be tempered by the attempts of some astrophysicist to remove the constancy of the gravitational constant in order to decrease or suppress the recourse to dark matter for modeling the composition of the universe (Magueijo 2003 Moffat 2008). 

Barrow John D. (1942-) Brit, phys., protagonist of cosmology and gravitation theory as well as aspects of the history and philosophy of science, writer of popularizing books... 

Analogously, calculus provides access to tractable mathematics and analytical solutions previously inaccessible to the human brain. Augmentation can then be considered as a qualitative shift in abilities. With results attainable only with calculus, the foundation can be solidly laid for theories that capture and explain physical phenomena. The development of the gravitational theory, the electromagnetic theory, or the quantum mechanical theory, is now possible, resulting, in turn, in tectonic changes in the human mindset. 

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