Talk:Lorentz covariance
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Note: this usage of the term covariant should not be confused with the related concept of a covariant vector. What does this statement mean, exactly? -- Decumanus | Talk 06:46, 22 Mar 2004 (UTC)
- Strictly speaking, covariant vectors are vectors living in a cotangent space of some manifold. In general relativity, a covariant 4-vector is, in fact, a Lorentz covariant quantity, but so is a contravariant 4-vector — which is a little confusing. Nonetheless, the terminology is standard. -- Fropuff 06:51, 2004 Mar 22 (UTC)
- O.K. I thought you meant something like that, but I wasn't sure from the phrasing. Perhaps something like this should be in the article itself. -- Decumanus | Talk 06:55, 22 Mar 2004 (UTC)
I don't think this is true. One can imagine a non-uniform universe in which Lorentz covariance is true.
- Lorentz covariance is part of a broader concept of cosmological principle, that the universe, when viewed on sufficiently large distance scales, has no preferred directions or preferred places. Poincaré covariance is the extension to the Poincaré group.
Roadrunner 02:22, 23 Jul 2004 (UTC)
Comprehensible? I don't think so.
This article is quite impossible to understand unless you have a degree in physics. Couldn't we add something like "Imagine a volleyball match, where the ball contiuously moves between... " or something like that to all the "Due to the ambiguity and indifference of the Lorentz-Eintein-Buggyman co-ordinated octopus, the Buron and Woron particles behave similarly due to the incoprehensible... " type paragraphs?