A Projective Interpretation of Some Doubly Special Relativity Theories
  A class of projective actions of the orthogonal group on the projective space is being studied. It is shown that the Fock--Lorentz, and Magueijo--Smolin transformations known as Doubly Special Relativity are such transformations. The formalism easily lead to new type transformations. 
N. Jafari, A. Shariati
gr-qc