r: {(&/x)+((-/|x)%w)*!w} / sample range m: {x+(-/y*y;2*…

Twetch ·

r: {(&/x)+((-/|x)%w)*!w} / sample range
m: {x+(-/y*y;2**/y)} / mandelbrot iteration
i: {+/{4>+/x*x}'15 m[x]\0} / iterate to convergence
c: (r xr),/:\:r yr / screen point coordinates

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