Jorge Stolfi, 2011-11-04
Here is a practical joke that you may want to play upon a fellow topologist.
Then replace the jacket and wait for your friend to put it on. Enjoy his confusion as he suddenly and inexplicably finds himself unable to tell whether the jacket is inside-out or not.
Note that there is no need to use the same type or color of cloth for the Möbius strip, since topologists are notoriously unable to perceive those details. Indeed, the strip could have any size or shape; the dimensions given above are merely to make it easier to sew onto the hole.
Last edited on 2011-12-04 22:28:43 by stolfi