Comment on "Two Phase Transitions in the Fully frustrated XY Model"
  The conclusions of a recent paper by Olsson (Phys. Rev. Lett. 75, 2758 (1995), cond-mat/9506082) about the fully frustrated XY model in two dimensions are questioned. In particular, the evidence presented for having two separate chiral and U(1) phase transitions are critically considered. 
Jorge V. Jos\'e and G. Ram\'irez-Santiago