--- | --->
                     i 	|  k  

	Corresponds to the knot group constraint

		    K = J I J 

	where the generators I, J, K, correspond 

	to strands that are mapped to the numbers 
	i, j, k, respectively.
Charilaos Aneziris, aneziris@hades.ifh.de COPYRIGHT STATEMENT Educational institutions are encouraged to reproduce and distribute these materials for educational use free of charge as long as credit and notification are provided. For any other purpose except educational, such as commercial etc, use of these materials is prohibited without prior written permission.