2 problems

A rotation snark is a snark with a balanced hist and a $\frac{2\pi}{3}$-rotation symmetry fixing one vertex. Hoffmann-Ostenhof and Jatschka's conjecture. There are infinitely many…

Let $T_1$ and $T_2$ be trees with an upper bound in the Tamari lattice $\mathscr{C}_n$, and let $\mathscr{R}_n$ be the rotation graph on these trees. A shortest path in…