3 problems

Let $\mathscr L$ be a link type in $\mathbb S^3$. A rectangular diagram representing $\mathscr L$ is non-simplifiable if it cannot be reduced by the simplifying moves considered fo…

Let $\mathscr L$ be a link type in $\mathbb S^3$. A Legendrian link type is non-destabilizable if it cannot be obtained from another Legendrian link type by a destabilization. Fini…

A free $21n$ knot is the free knot diagram formed from the $21$-tangle and a free $n$-tangle, as used in the source. Resultants are knots obtained by assigning all free crossings.…