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. 2017 Apr 12;473(2200):20160770. doi: 10.1098/rspa.2016.0770

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© 2017 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 14. — An overhead view of the tying of the weak knot (on the left of each image panel) and the tying of the strong knot (on the right of each image panel). Note, importantly, that the two knots only differ in the relative tying of the second trefoil to the first trefoil (cf. panels (b) and (c)). Further, after the loops are pulled out (indicated by the white arrows in panels (e) and (f)) the weak and strong knots become the prototypical false/granary/granny and square/reef knot (cf. panel (g)), respectively. Depictions of the (h) strong knot and (i) square knot illustrating their underlying structure. Colour coding shows equivalent knot sections and demonstrates that the strong knot is equivalent to the square knot with its free ends (yellow and orange) tucked into the knot centre to create loops. Subfigure (j) shows the relative dimensions of a knot tied according to the template. The free-end length (α) is equal to half of the loop chord length (β). (Online version in colour.)

Figure 14. — An overhead view of the tying of the weak knot (on the left of each image panel) and the tying of the strong knot (on the right of each image panel). Note, importantly, that the two knots only differ in the relative tying of the second trefoil to the first trefoil (cf. panels (b) and (c)). Further, after the loops are pulled out (indicated by the white arrows in panels (e) and (f)) the weak and strong knots become the prototypical false/granary/granny and square/reef knot (cf. panel (g)), respectively. Depictions of the (h) strong knot and (i) square knot illustrating their underlying structure. Colour coding shows equivalent knot sections and demonstrates that the strong knot is equivalent to the square knot with its free ends (yellow and orange) tucked into the knot centre to create loops. Subfigure (j) shows the relative dimensions of a knot tied according to the template. The free-end length (α) is equal to half of the loop chord length (β). (Online version in colour.)