Comment on "Absence of Compressible Edge Channel Rings in Quantum   Antidots"
  In a recent article, Karakurt et al. [I. Karakurt et al., Phys. Rev. Lett. 89, 226803 (2002)] reported the absence of compressible regions around antidots in the quantum Hall regime. We wish to point out a significant flaw in their analysis, which invalidates their claim. 
M. Kataoka and C. J. B. Ford