... finite-dimensional vector space V from among a set of vectors X generated combinatorially, when it is not readily apparent how to order X or a canonical spanning set of V in a convenient way The motivation for ... which allows X to be a spanning set Is there a way to use a spanning set X ⊆ N (r, e) for Vm (r, e) to generate a spanning set Y ⊆ N (r + 1, e) for Vm′ (r + 1, e)? Are there other combinatorial ... 2, and S1 has a maximal number of vertices We emphasize that a tree can fall into a category in more than one way For example, the tree falls into Category I in three ways, and the tree falls...