Talk:Unknotting problem

Ochiai unknot
The picture of "the Ochiai unknot" is not the unknot that took a long time for a computer to untangle. Ochiai has designed a number of of difficult unknots, and the pictured one is reportedly in his textbook about computational knot theory.

The paper by Andrew, Kavraki, Lydia (cited in the article) cites the paper by Grzeszczuk, Huang, and Kauffman. They show their unknot on page 271, figure 10, and it is obviously more complicated. They cite Ochiai's paper, but unfortunately they do not specify which of the three knots it is. It appears to be the knot in figure 3.

I will move the image to unknot and add these citations. I will leave it for later or someone else to verify that figure 3 of Ochiai's paper is the unknot from Grzeszczuk, Huang, and Kauffman and redraw it for Wikipedia. — Preceding unsigned comment added by Kmill (talk • contribs) 21:53, 10 November 2017 (UTC)