3 problems

Let $w_0$ be the longest element of the Weyl group, let $\mathbf{i}$ and $\mathbf{j}$ be reduced expressions of $w_0$, let $C_{\mathbf{i}}$ be the Lusztig cone, and let … be the tr…

Let $S$ be a closed piecewise-linear surface, and let $(G_S^\star,\boldsymbol p)$ be its coned framework: the framework has the vertices and edges of $S$, together with a cone vert…

Let $n\geq 3$ and let $M^n$ be an $n$-dimensional $PL$-manifold. A PL isometric embedding is an embedding of $M^n$ into Euclidean space that preserves its piecewise-linear metric.…