2 problems

Let $G$ be a planar graph, and let $\operatorname{obs}(G)$ denote its obstacle number. Planar obstacle-number conjecture. If $G$ is a planar graph, then … The paper had not found a…

Let $X_n$ denote the gyroelongated $n$-bipyramid, and let ${\operatorname{{obs}}}_\mathrm{out}(X_n)$ be its outside obstacle number. Obstacle-number conjecture. If $n\geq 4$, then…