Undergrad Theorem Proved: Universal Speed C in SR?

[andrew s 1905]

I recall reading on this forum that a theorem had been proved to the effect that is there was a effective speed limit c in SR then there would only be one such limit for all relevant phenomena.

Is this true and if so can you point me at it as I don't seem to be able to formulate the question well enough to get hit on here or Google.

Thanks Andrew

 

[Dale]

See here:

https://arxiv.org/abs/physics/0302045

They also give a literature review with references 1-11 being previous similar work.

 

[Herman Trivilino]

Is this true and if so can you point me at it as I don't seem to be able to formulate the question well enough to get hit on here or Google.

Try "why invariant speed must be fastest speed" without the quotes.