Piet Hein (Denmark)

Piet Hein (December 16, 1905 - April 18, 1996) was a scientist, mathematician, inventor, author, and poet, often writing under the Old Norse pseudonym "Kumbel" meaning "tombstone". His short poems, gruks (or grooks), first started to appear in the daily newspaper "Politiken" shortly after the Nazi Occupation in April 1940 under the signature Kumbel Kumbell.

References

• Gardner, Martin: Piet Hein's Superellipse. - in Gardner, Martin: Mathematical Carnival. A New Round-Up of Tantalizers and Puzzles from Scientific American. New York: Vintage, 1977, pp. 240-254.
• Johan Gielis: Inventing the circle. The geometry of nature. - Antwerpen : Geniaal Press, 2003. - ISBN 9080775614