David Smith, a hobbyist mathematician based in the UK’s East Yorkshire, is largely responsible for figuring out one of the most puzzling visual mathematical problems: “is there a shape that can be arranged in a tile formation, interlocking with itself ad infinitum, without the resulting pattern repeating over and over again?” The search for this “Einstein” shape—an aperiodic monotile—has been predicted to exist, but never …
Hobbyist Mathematician Invents 13-Sided “Einstein” Shape