DescriptionParabolic chessboard for internal angle 1 over 3 with target set.png
English: Julia set for internal angle 1 over 3 with marked components and target set for numerical approximation of the parabolic chessboard (BDM). How imprecise it is one can see lookeing at critical orbit inside a trap: it should be precisely on the straight line from critiical point to period parabolic 1 point. It is in the white triangle, not on the border. Why 4 triangles not 2 ? the result looks better, Julia set is invariant under point reflection through its center, it is said to possess central symmetry or to be centrally symmetric.
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