Quantum Hall effect at low magnetic fields due to electron-electron interaction: A Comment on cond-mat/9906450 (published in Phys. Rev. Lett. 84, 3141 (2000))

In a recent preprint cond-mat/9906450 (published in PRL 84, 3141 (2000)) Bodo Huckestein showed that at real experimental conditions it is not possible to observe the quantum Hall effect (QHE) at ${\omega }_c\tau <1$ predicted by Khmelnitskii (${\omega }_c=eB\mathrm{/}m$ is the cyclotron frequency and $\tau$ is the scattering time). We would like to point out here that in fact the situation is not so hopeless due to the influence of the electron-electron interaction.