The net and an ink stain

haiha

Thanks for your reply.
A 'knot point' is the crossing point of 2 any lines of the net. The sheet of paper and the net are considered infinitively large, and the ink stain also can be of any shape. The only constraint of the stain is that its area is smaller than 1 cm2.

haiha	Thanks for your reply. A 'knot point' is the crossing point of 2 any lines of the net. The sheet of paper and the net are considered infinitively large, and the ink stain also can be of any shape. The only constraint of the stain is that its area is smaller than 1 cm2.