Mathematica: How to create a pin cushion (or barrel) distortion from the square function on Carte...
How to create a pin cushion (or barrel) distortion from the square function on Cartesian coordinate?
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Thanks to all those great people for their contributions!
(mathematica.stackexchange.com/users/40035/taeshin-kim)Taeshin Kim
(mathematica.stackexchange.com/users/46318/daniel-huber)Daniel Huber
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special-functions coordinate-transformation numerics