The Partial Visibility Representation Extension Problem

Steven Chaplick, Grzegorz Guśpiel, Grzegorz Gutowski +2

For a graph $G$, a function $\psi$ is called a \emph{bar visibility representation} of $G$ when for each vertex $v\in V(G)$, $\psi (v)$ is a horizontal line segment (\emph{bar}) and $uv…