ON THE METASTABLE STATES OF THE ZERO-TEMPERATURE SK MODE

We generalize the calculation of the average number of metastable states of the Sherrington-Kirkpatrick spin-glass model at zero temperature to the case where there is an external magnetic field and the case where there is an asymmetric bond distribution. The results are in agreement with the existence of the AT instability at zero temperature for all finite values of external field and average bond value. We conclude the paper by examining the question of dual metastability, i.e. when spin configurations are metastable both with and without the presence of a magnetic field.