Comments, with reply, on `Fast interpolation algorithm using fast Hartley transform´ by J.I. Agbinya

The commenters point out and correct several errors in the original letter (ibid., vol.75, no.4, p.523-4, Apr. 1987). In replying the author states that some suggested corrections to the gain of the low-pass filter and the kernel of the cas function, respectively, are in order. But the author points out that Hsa et al. have introduced a further error into the cas function themselves. The correct version is shown