Project GutenbergSwedish mathematician Niels Fabian Helge von Koch was born #OTD in 1870.
He gave his name to the famous fractal known as the Koch snowflake, one of the earliest fractal curves to be described. It is based on the Koch curve, which appeared in a 1904 paper titled "On a Continuous Curve Without Tangents, Constructible from Elementary Geometry."
Sus Andersson