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**Double Special Relativity (DSR) fake or real??**

I have read several webpages about this 'new' kind of interpreting Relativity, as far as i know you consider that appart from light speed 'c' you need to have an invariant PlanckEnery and Planck-time, my questions are.

a) What's the metric for this DSR [tex] g_{ab}dx^{a} dx^{b} [/tex]

b) What're the DSR Lorentz transforms ?

c) What's the 'Energy' (if any) Hamiltonian or Lagrangian for this theory?

If possible be expresive as you can since i don't know higher algebra..