Any knot or link can be relaxed using a variety of dynamical models.
The picture shows the forces acting on a trefoil created from the
This allows the knot to go from
(MPEG animation 50 kbytes,
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The dynamical model used most frequently consists of two components:
In most situations, these two forces eventually balance out and
something approaching the canonical shape of the knot results.
- An attractive force applied to adjacent "beads" on the knot.
The beads are the yellow spheres in the above picture.
This makes each of blue cylinders act something like a spring.
- A repulsive "electrical field" acting between all other pairs
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