Enlarged Bound on the Measurability of Distances and Quantum   $\kappa$-Poincar\`e Group
  When quantum mechanical and general relativistic effects are taken into account in the analysis of distance measurements, one finds a measurability bound. I observe that some of the structures that have been encountered in the literature on the Quantum $\kappa$-Poincar\`e Group naturally lead to this bound. 
G. Amelino-Camelia