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Status of relativistic 2body problem 
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#19
Feb1912, 11:13 AM

P: 17

That article is a "classic". I've read it numerous times and I'm embarrassed to say that I still don't understand all of it. Now that I'm retiring, I'll have plenty of time to continue to study it. Thanks for your suggestion, HeavyWater 


#20
Feb1912, 11:33 AM

P: 17

Heavywater 


#21
Feb1912, 11:40 AM

P: 17

I'll have to get copies of these papers on Tuesday, to give you an intelligent reply. Thanks for your inputs and I'll get back with you as soon as I can read these documents. I do appreciate your comments about the status of this "problem". It looks like I will have plenty of things to think about in retirement. You will hear from me in about a week. Heavywater 


#22
Feb2112, 06:32 PM

P: 17

I got out my reread your quote above. Before I get into my questions, I have got to ask you what do CJS mean by "manifest invariance"? Why the word, "manifest". Does "manifest invariance" differ from "invariance" in some way? I note that CJS defines "manifest invariance" a sentence or two below your quote. They also define it on p351 of CJS, " ... property that the world line of a particle transforms as a sequence of space time events according to the usual Lorentz transofmation formula." And then below that (also on p351), " ... be formulated in terms of a set of equations involving these Lie brackets". So, is Manifest invariance different than invariance? Is it a "stronger" form of invariance? Thanks, Heavywater 


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