3 problems

Symmetric-orbit convex-hull conjecture. The intersection

Let $\ell\in\mathbb{R}$, let $\Delta\in{\mathcal{T}}_{\ell}$, and let $\theta_{ij}$, $1\leq i<j\leq4$, be the dihedral angles of $\Delta$. Set … and let $\Delta'\in{\mathcal{T}}$ b…

Let ${\mathcal{T}}_\ell$ denote the space of truncated hyperbolic tetrahedra whose edge lengths satisfy the constraint defining ${\mathcal{T}}_\ell$, and let $\Delta_\ell$ be the r…