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	0 1    Set the parameter k that defines the distance between two clusters. If you take the cartesian product of all dots in cluster A and all dots of cluster B you get (a,b)-tuples. Aligned by their distance d(a,b), k depicts a quantile on them. Long story short: k=0: the distance of two clusters is the distance of their closest points. k=1: the distance of two clusters is the distance of their farthest points.
	less/more clusters