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3 days ago · Every physical theory that complies with the special theory of relativity can, by means of the absolute differential calculus, be integrated into the system of general relativity theory - without the latter providing any criteria about the admissibility of such physical theory.
16 hours ago · In the theory of general relativity, in fact, the three dimensions of space (x, y, z) that make up the geometric dimensions of a particle are a package of energy mass whose specific time is t, and Einstein called it the fourth dimension of space time, or rather specific time, called a particle (with coordinates x, y, z) (Nickerson et al. 2004 ...
2 days ago · All theories discussed in this paper belong to the standard General Relativity Theory, the only non-standard element being their (much simpler) mathematical formulation. As a mathematical bonus, we propose a new formalism in the calculus of variations, because in case of hyperbolic field theories the standard approach leads to nonsense conclusions.
5 days ago · Special Relativity Uniform motion can only be measured relative to some external reference. This is discussed followed by three space-traveling thought experiments.
3 days ago · In 1905, Albert Einstein upended commonly held notions about space and time in his Special Theory of Relativity. Ten years later, he changed our understanding of gravity with his General Theory of Relativity.
3 days ago · Under these circumstances, Albert Einstein taught in his theory of general relativity that the gravitational field of everything in the universe so warps space and time as to require a very careful reevaluation of quantities whose seemingly elementary natures are normally taken for granted.
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1 day ago · It has been suggested in recent literature that nonlinear and/or gravitomagnetic general relativistic effects can play a leading role in galactic dynamics, partially or totally replacing dark matter. Using the “quasi-Maxwell” formalism, we show, on general grounds, such hypothesis to be impossible. 1 More. Received 19 March 2024.
