Fractals
Who
Benoit Mandelbrot, mathematician of Lithuanian-Jewish descent
When
1975
Where
France / United States (IBM Research)
Benoit Mandelbrot coined the term 'fractal' for infinitely self-similar shapes and revealed how they describe coastlines, clouds and financial markets. Born to a Lithuanian Jewish family in Warsaw, he fled the Nazis in France and later worked at IBM; the Mandelbrot set is named after him.
Part of “The Gifts of the Jews” — verified Jewish contributions to the world, with sources.