“A fractal is a mathematical set or concrete object that is irregular or fragmented at all scales…”

— Benoît Mandelbrot

As quoted in a review of The Fractal Geometry of Nature by J. W. Cannon in The American Mathematical Monthly, Vol. 91, No. 9 (November 1984), p. 594

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Benoît Mandelbrot56

Polish-born, French and American mathematician 1924–2010

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“A fractal is a mathematical set or concrete object that is irregular or fragmented at all scales…”

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