Lebrecht Goeritz was a German mathematician who designed some trivial knots almost a century ago. His most famous unknot has eleven crossings.
A way to unknot it:
So, despite its appearance, Goeritz’s Unknot is equivalent to a circle.
Lebrecht Goeritz was a German mathematician who designed some trivial knots almost a century ago. His most famous unknot has eleven crossings.
A way to unknot it: