2+1 gravity and doubly special relativity

@article{Freidel200321GA,
  title={2+1 gravity and doubly special relativity},
  author={Laurent Freidel and Jerzy Kowalski-Glikman and Lee Smolin},
  journal={Physical Review D},
  year={2003},
  volume={69},
  pages={044001}
}
It is shown that gravity in 2+1 dimensions coupled to point particles provides a nontrivial example of doubly special relativity (DSR). This result is obtained by interpretation of previous results in the field and by exhibiting an explicit transformation between the phase space algebra for one particle in 2+1 gravity found by Matschull and Welling and the corresponding DSR algebra. The identification of 2+1 gravity as a DSR system answers a number of questions concerning the latter, and… 

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