8 18 Quick Notes

According to Mathematical Models by H. Martyn Cundy and A.P. Rollett, second edition, 1961 (Oxford University Press), p. 57, a flat ribbon or strip can be tightly folded into a heptagonal 8_18 knot (just as it can be tightly folded into a pentagonal trefoil knot).

This is the Carrick loop of practical knot tying. The Carrick bend of practical knot tying can be found at $8_{7}^{2}$.