Given circles which intersect times, the set of circles is referred to as magic circles if there exists a numbering (using
) of the intersections of the circles such that the sum of the numbers at the intersections along each circle is the same constant for all circles.
Further reference: http://www.cgl.uwaterloo.ca/ smann/Magic/
This is version 4 of magic circles, born on 2004-03-13, modified 2004-11-19.
Object id is 5704, canonical name is MagicCircles.
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