Composite Fermion Hall Conductance at $ν=1/2$
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We show that in the limit of vanishing bare electron effective mass, and in the presence of particle-hole symmetric disorder (which can be of vanishing strength), the composite fermion Hall conductance is constrained to be $-{1\over 2}\frac{e^2}{h}$. We discuss the implications of this results for the existence and nature of a composite Fermi liquid in the lowest Landau level.
9 pages, RevTeX, 4 PS figures
9 pages, RevTeX, 4 PS figures