This is "because" those correspond exactly to the Hammersley sequence, a well-known quasi-random sequence of points: http://mathworld.wolfram.com/HammersleyPoi

This is "because" those correspond exactly to the Hammersley sequence, a well-known quasi-random sequence of points: http://mathworld.wolfram.com/HammersleyPointSet.html http://mathworld.wolfram.com/HammersleyPointSet.html