Experimentally obtaining metrics in general relativity

Abstract

It seems to be not well known that the metrics of general relativity (GR) can be obtained without integrating Einstein equations. To that, we need only define a unit for GR-interval s, and observe 10 geodesics (out of which at least one must be nonnull). Even without using any unit, we can have gμ(x), where =const. Our notes attempt to simplify the articles of E. Kretschmann (1917) and of H.A. Lorentz (1923) about this last subject. The text of this article in English will soon be available, in LaTeX. Please ask the author. ----- /Sajne estas malmulte konata ke la metrikoj de /generala relativeco (/GR) povas esti havataj sen integri Einstein-ajn ekvaciojn. Por tio, ni bezonas difini nur unuon por /GR-tempo s, kaj observi 10 geodezajn (el kiuj, almena/u unu devas esti nenulan). E/c sen uzi iun unuon, ni povas havi gμ(x), kie =konst. Niaj notoj tentas simpligi la artikolojn de E. Kretschmann (1917) kaj de H.A. Lorentz (1923) pri tiu lasta afero.

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