43 citations
- American Astronomical SocietyUS2 papers
- City University of Hong KongHK2 papers
- Rice UniversityUS2 papers
- Royal Astronomical SocietyGB2 papers
- Texas A&M UniversityUS2 papers
- University of WashingtonUS2 papers
- Adirondack Medical CenterUS1 paper
- Applied Science Associates (United States)US1 paper
- Arizona State UniversityUS1 paper
- Astronomical Institute of the Slovak Academy of SciencesSK1 paper
- Atkins (United States)US1 paper
- Bear ValleyUS1 paper
4 papers · 1 filter
The zero forcing numbers and propagation times of gear graphs and helm graphs
Sara Anderton, Rilee Burden, McKenzie Fontenot +8
Zero forcing is a dynamic coloring process on graphs. Initially, each vertex of a graph is assigned a color of either blue or white, and then a process begins by which blue vertice…
Polyunsaturated Posets and Graphs and the Greene-Kleitman Theorem
Glenn G. Chappell
A partition of a finite poset into chains places a natural upper bound on the size of a union of k antichains. A chain partition is k-saturated if this bound is achieved. Greene an…
A Matroid Generalization of a Result on Row-Latin Rectangles
Glenn G. Chappell
Let A be an m \times n matrix in which the entries of each row are all distinct. Drisko showed that, if m \ge 2n-1, then A has a transversal: a set of n distinct entries with no tw…
A Lower Bound for Partial List Colorings
Glenn G. Chappell
Let G be an n-vertex graph with list-chromatic number . Suppose each vertex of G is assigned a list of t colors. Albertson, Grossman, and Haas conjecture that at least $t n…