“Most of the world is of great roughness and infinite complexity. However, the infinite sea of complexity includes two islands of simplicity: one of Euclidean simplicity and a second of relative simplicity in which roughness is present but is the same at all scales.”

—  Benoît Mandelbrot

Source: The Fractalist (2012), Ch. 29, p. 299

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Benoît Mandelbrot56
Polish-born, French and American mathematician 1924–2010

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