On November 20, 1924, French American mathematician Benoite B. Mandelbrot was born. Mandelbrot worked on a wide range of mathematical problems, including mathematical physics and quantitative finance, but is best known as the popularizer of fractal geometry. He was the one who coined the term 'fractal' and described the Mandelbrot set named after him.
A. Sacristán. Representations and Mathematics Visualization. Working Group Representations and Mathematics Visualization (1998-2002), North American Chapter of the International Group for the Psychology of Mathematics Education, стр. 127-142. (2002)