3 problems

Let $\|\cdot\|_{\mathcal{P}}$ be a polyhedral norm on $\mathbb{R}^2$ whose unit ball $\mathcal{P}$ is a quadrilateral. Let $G$ be a finite simple graph, let…

Let $\mathcal{Y}$ denote the cylinder. Let $S$ be either the group $\mathcal{C}_s$ or the group $\mathcal{C}_i$, and let $(G,p)$ be an $S$-generic framework on $\mathcal{Y}$. The c…

Let $\mathcal{S}$ denote the sphere. For a $S$-symmetric framework, let $S$ be either the group $\mathcal{C}_{mh}$ with $m$ even or the group $\mathcal{S}_{2m}$ with $m$ odd. Let…