Description9-23 knot-theory 2-symmetrical.png Depiction of 9_23 knot of knot theory with 2-fold rotational symmetry. Topologically equivalent to File:9crossing-knot...
laid out on a 3×3 grid. Topologically equivalent to Image:9-23 knot-theory 2-symmetrical.png . Date 2013 Source Converted from a version of the following...
