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Shubee's Avatarhttp://hypography.com/forums/ The Essential History of Special Relativity
Shubee
Posted 06-13-2008
The genesis of the theory of relativity was a long process that involved three major players and their critical reactions to the electrodynamics of moving bodies.

Lorentz made a key step when he sought to develop a mechanics that would obey the principle of relativity and Maxwell's...
  #10  
By snoopy on 06-17-2008
Re: The Essential History of Special Relativity

Very Interesting

I enjoyed reading the axiomatization of physics.

I look forward to further posts.

I often wondered whether it was possible to build a spacetime with a recursive nature maybe you can answer that question sometime..

Thanks again

Peace
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  #11  
By Shubee on 06-17-2008
Cool Re: The Shubertian Clock

Quote:
Originally Posted by snoopy View Post
Very Interesting

I enjoyed reading the axiomatization of physics.

I look forward to further posts.

I often wondered whether it was possible to build a spacetime with a recursive nature maybe you can answer that question sometime..

Thanks again

Peace
My very conventional solution of the equations for the three frame universe \Xi_3 assumed that those equations were functional equations with independent velocity variables. I didn’t have to assume mathematical simplicity; I believe it’s obvious that infinity many other solutions also exist. If I had decided against finding a simple answer, then I would only be left with an extraordinarily complicated solution strategy. If I had pursued that rebellious strategy, which would only be regarded as being mischievous, then the construction of \Xi_4 and all higher order universes would involve a recursive process that would depend on the previous steps taken.

To give you an idea of what some of those universes look like, begin with generalizing the Lorentz transformation written in terms of rapidity \theta. Assume the more general form:

x' =x\cosh\sigma(\theta) -t\sinh\sigma(\theta)

t'=-x\sinh\sigma(\theta) +t\cosh\sigma(\theta)

Next, suppose that a set of transformations of this type satisfy the properties of a mathematical group and conclude immediately that

\sigma (\theta + \phi)= \sigma (\theta) + \sigma (\phi)

Nontrivial solutions to this equation exist, but they all require the Axiom of Choice. The only continuous solutions are of the form \sigma(\theta)= \alpha \theta where \alpha is a constant. The nontrivial solutions are discontinuous at every point.

Shubee
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  #12  
By Shubee on 06-18-2008
Smile The Simplest Spacetime Imaginable

Quote:
Originally Posted by modest View Post
The type of derivation you're doing was done by Jean-Marc Lévy-Leblond in 1976.
The clearest reason this is impossible is that Jean-Marc Lévy-Leblond and I come up with different conclusions. Please note this claim by Richard T. W. Arthur and his alleged agreement with Harvey R. Brown and Lévy-Leblond:

Quote:
I am going to assume the linearity of these transformations; this follows from the homogeneity of spacetime. HB himself outlines two different ways of proving linearity from homogeneity (26-28), one of which is given a general treatment in Lévy-Leblond (1976). —Richard T. W. Arthur, Time, Inertia and the Relativity Principle, p. 10.
In my paper, The Axiomatization of Physics - Step 1, it’s already clear from the fundamental equations of \Xi_2 that the most complete description of the simplest spacetime imaginable is given by nonlinear transformation equations.
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  #13  
By modest on 06-18-2008
Re: The Essential History of Special Relativity

I'm looking at Brown's book:

pages 26-27

and he seems to make a good case for linearity.

I'll have to find Lévy-Leblond's work on it and go back to your paper to make any kind of intelligent comment. The only derivation I've ever done is Einstein's special relativity and that was some time ago. So, this may take some time for me to properly follow.

-modest
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