by Jon Kujawa
On October twenty-first was Martin Gardner's 100th birthday. In celebration nearly one hundred Celebration of Mind (CoM) events are being held around the world. There are a few still yet to come: check their events listing to find one near you [1]. The CoM is an annual affair in which people celebrate all the things Martin loved: magic, art, music, mathematics, science, and the sheer joy of curiosity and discovery.
You're the sort of person who should go to a CoM if you think a computer constructed from 10,000 dominoes is really, really cool. Or a paper cutout dragon which appears to turn its head as you move. Or if you can't help but be intrigued by a question like “If you heat up a metal washer, does the hole in the center get larger or smaller?”
Who was this Martin Gardner fellow who inspired so many people? Born and raised in Tulsa, Oklahoma, he is right up there with Will Rogers and Woody Guthrie in the pantheon of influential Okies. Gardner earned a degree in Philosophy from the University of Chicago and thereafter became a writer.
In 1956 he wrote an article for Scientific American about hexaflexagons: flat shapes you can construct from single sheet of paper which can flexed to reveal more than the two sides you expect. There's a nice video by James Grime in honor of Martin Gardner which shows how to construct the six sided version.
The article was so popular that Martin Gardner was invited to write a monthly column for Scientific American on “recreational mathematics”. He did so for twenty-five years and forever set the bar on writing mathematics for a general audience. His columns introduced the world to Conway's Game of Life and cellular automata, Penrose's infinite tiling of the plane with a pattern which never repeats despite using only two different tiles, the now-widely-used RSA encryption scheme, and the Mandelbrot set we ran into last month.
