Knot T-shirt

Knowing what to wear will knot be a problem with this t-shirt.
• It features the only known 15-crossing amphichiral knot; and in fact, it’s the only
known amphichiral knot with an odd number of crossings.
• Amphichiral means that the knot and its mirror image are the same. For a full
explanation, check out the knot article on page 14 of this magazine!