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).<>