Talk:Invariant (physics)

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This is kind of messed up. invariant != conserved. It should say that invariant quantities are those which aren't different in different reference frames. Acceleration is certainly not conserved, but it is invariant in Galilean transformations (constant velocity). Also energy is conserved in a reference frame, but it is not generally invariant between reference frames. Rotiro 07:34, 25 May 2006 (UTC)

Yeah, this whole article is BS. I'm turning it into a redirect. —Keenan Pepper 18:35, 25 May 2006 (UTC)
Okay, but I think there could be some important things to say about invariance in physics in its own right. Look at all the articles that link to invariance (physics). Covariance and contravariance references invariance several times, even in the very first sentence of the article. Symmetry_in_physics also discusses invariance. I don't think Covariance and contravariance fits the bill in terms of invariance in physics, it's mostly an abstract, mathematical discussion. Invariant (physics) could list invariant quantities (such as invariant mass), maybe discuss gauge invariance, etc. If that is agreed, should the "expansion" or stub tag be added to this article? Or maybe Invariant (physics) should redirect to symmetry in physics instead ?? Also, there's nothing under transformation specifically about physics. Rotiro 02:31, 26 July 2006 (UTC)
If you want to start an article here, go right ahead. —Keenan Pepper 02:41, 26 July 2006 (UTC)