The idea and the default values are from this book, and the two equations are attributed to 畑正義. This page provides some info.

Use firefox (not chrome) to be able to right-click to save to image. I intend to fix this (so that one can save image from chrome too).

          f0(z) = az + b(z*)
          f1(z) = c(z-1) + d(z* -1) +1
        

Set&calc

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