Boy’s surface Posted on 2021/01/13 by Carl Robitaille Boy’s surface After a couple of failures, here is a 3D print of a Boy surface (https://t.co/afQWL1XyCx). The challenge of printing non-orientable objects! #3Dprinting #IllustratingMath pic.twitter.com/6ADI40rk9r— Rémi Coulon (@LaMiReMiMath) September 15, 2020