  While the static capacitance matrix is always symmetric and thus an even
function of the magnetic field, the dynamic capacitance matrix of
multi-terminal samples obeys in general only the weaker Onsager-Casimir
symmetry relations. Our results are in accordance with recent experimental
observations of asymmetric dynamic capacitances in quantized Hall systems. We
predict quantization of the four-terminal resistances of an insulating Hall
sample.
