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Four-force
About: Four-force is a research topic. Over the lifetime, 3459 publications have been published within this topic receiving 87308 citations.
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16 citations
16 citations
TL;DR: In this article, the existence of simultaneous points in the neighborhood of an observer P is studied and it is shown that the set of such points has the structure of a regular submanifold of the space-time manifold.
Abstract: In this paper the existence of simultaneous points, in the Landau sense, in the neighborhood of an observer P is studied. It is shown that the set of such points has the structure of a regular submanifold of the space–time manifold.
16 citations
TL;DR: In this paper, an axiomatization of the general theory of relativity is proposed, where none of the "principles" commonly considered as founding the theory, such as the equality of inertial and gravitational mass, equivalence, general covariance, and Mach's principle, are taken as axioms in their system.
Abstract: An axiomatization of the general theory of relativity is proposed. The assumed philosophical background is critical realism. None of the “principles” commonly considered as founding the theory, such as (a) the equality of inertial and gravitational mass, (b) the principle of equivalence, (c) the principle of general covariance, (d) the geodesic postulate, and (e) Mach's principle, are taken as axioms in our system.
16 citations
16 citations