[math-fun] Ford circle blues

http://www.squaring.net/downloads/ford-circle-blues.ps http://www.squaring.net/downloads/ford-circle-blues.pdf % an adaption of Noam Elkies ford.ps (postscript that recursively draws Ford circles) % original at http://www.math.havard.edu/~elkies/Misc/ford.ps % see http://www.math.havard.edu/~elkies/Misc/#pstrix (added some reflections and colouring in shades of blue) Stuart Anderson