polyoVertices -- Vertices of a collection of cells
Usage:
polyoVertices Q
Inputs:
Q, a collection of cells
Outputs:
the list of all vertices of the collection of cells encoded by Q
Description
Let $\mathcal{P}$ be a collection of cells. The set of vertices of $\mathcal{P}$ is the union of the vertices of all its cells. This function returns the list of all vertices of $\mathcal{P}$.