Fast rates for empirical vector quantization
  We consider the rate of convergence of the expected loss of empirically optimal vector quantizers. Earlier results show that the mean-squared expected distortion for any fixed distribution supported on a bounded set and satisfying some regularity conditions decreases at the rate O(log n/n). We prove that this rate is actually O(1/n). Although these conditions are hard to check, we show that well-polarized distributions with continuous densities supported on a bounded set are included in the scope of this result. 
Cl\'ement Levrard (UP11, UPMC, INRIA Saclay - Ile de France)
math.ST stat.TH