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11.16.17  Check if circles are in a bundle: is_harmonic_circle_bundle

The is_harmonic_circle_bundle command takes as argument a list or sequence of circles.

is_harmonic_circle_bundle returns

  1. 1 if the circles pass through a common point
  2. 2 if the circles are concentric
  3. 3 if the circles are the same
  4. 0 otherwise

Input:

is_harmonic_circle_bundle([circle(0,i),circle(4,i),circle(0,1/2)])

Output:

1

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