Comments, with reply, on "A generalization of Van den Berg's integral-square error computational technique for scattering" by A.J. Mackay and A. McCowen

The commenters note that if the conjugate gradient method were used in the above named work (ibid., vol.AP-35, p.213-20, Feb. 1987) its use automatically enforces the orthogonality of the authors' functions, without requiring any additional storage. In replying the authors agree that it was perhaps an oversight not to compare Van den Berg's method with the conjugate gradient method. However, they note that it was not their aim to provide such a comparison, but only to show how improvements could be made to the spectral iteration technique (SIT).<
>