Comment on ``Critical Behavior in Disordered Quantum Systems Modified by   Broken Time--Reversal Symmetry''
  In a recent Letter [Phys. Rev. Lett. 80, 1003 (1998)] Hussein and Pato employed the maximum entropy principle (MEP) in order to derive interpolating ensembles between any pair of universality classes in random matrix theory. They apply their formalism also to the transition from random matrix to Poisson statistics of spectra that is observed for the case of the Anderson-type metal-insulator transition. We point out the problems with the latter procedure. 
Martin Janssen (1), Boris Shapiro (2), and Imre Varga (1,3) ((1)   University of Cologne, (2) Technion, (3) Tecnical Univers...