Quadruply Special Relativity is Impossible

[Martin]

Oops. Then the condition should be kappa < E.

.

 

 

OK' date=' then how do you square that with the fact that the deformed Poincare group converges to the usual symmetries for kappa large

(as kappa goes to infinity)

 

this is the point I originally tried to ask you about:

 

You said:

 

Okay, I'm ready to make one comment on the "Deformed Special Relativity as an effective flat limit of quantum gravity" paper.

 

It seems to me that for this whole scheme to have any chance of working the energy scale given by kappa must lie below the energy scale at which the first correction to the hilbert action of GR becomes important.

 

 

And I replied:

 

 

please explain. Frankly I dont see why that should be.

 

I'm reminded of the sentence at bottom of page 3:

"...the deformed Poincare group becomes the usual Poincare group

in the continuum limit where kappa --> infinity."

[jana]

Okay, I'm trying to figure it out what's really going on here and will get back to you as soon as I can. As always, sorry about the delay.

[Martin]

not to be sorry

no urgency

(I have a lot on my plate at the moment too)